Le4283-4290 yf-vax vs

Yellow Fever Vaccine
YF-VAX
¨
Caution: Federal (USA) law prohibits dispensing without prescription.
DESCRIPTION
YF-VAX¨, Yellow Fever Vaccine, for subcutaneous use, is prepared by culturing the 17D strain of yellow fever virus in living avian leukosis
virus-free (ALV-free) chicken embryos. The vaccine, containing sorbitol and gelatin as a stabilizer, is lyophilized, and hermetically sealed
under nitrogen. No preservative is added. The vaccine must be reconstituted immediately before use with the sterile diluent provided
(Sodium Chloride Injection USP – contains no preservative). YF-VAX¨ is formulated to contain not less than 5.04 Log10 Plaque Forming
Units (PFU) per 0.5 mL dose. The vaccine appears slightly opalescent and light orange in color after reconstitution.
YF-VAX¨ complies with official potency tests and other requirements of the US Food and Drug Administration (FDA) and theWorld Health Organization (WHO).
CLINICAL PHARMACOLOGY
A clinical study to evaluate the serological responses and adverse reactions of Aventis’ YF-VAX¨ was performed on healthy young
adults. One group of six received yellow fever vaccine non-ALV-free (manufactured by Aventis Pasteur Inc.) and another group of
18 received an immunization with YF-VAX¨.1
Immunologic protection was measured utilizing a serum neutralizing antibody assay. No neutralizing antibody was detectedprior to immunization. Both groups demonstrated a 100% conversion in the post-immunization sera. The incidence and severityof adverse reactions in each group were comparable.1 In a study involving 101 Nigerian women in various stages of pregnancy, it was concluded that vaccinating pregnant women with the17D vaccines was not associated with adverse effects on the fetus or with risk of fetal infection. However, the percentage of pregnantwomen without neutralizing antibodies, who sero-converted, was significantly less than a non-pregnant control group (38.6% vs. 81.5%).2Following a mass immunization campaign in Trinidad, congenital infection based on the observation of virus specific IgM in the bloodof one infant exposed through maternal immunization with the 17D strain has been reported.3 This infant appeared normal at delivery.
One case of fatal vaccine-associated encephalitis occurred after 17D yellow fever vaccine was administered to an apparentlyhealthy 39-month-old girl.4 INDICATIONS AND USAGE
YF-VAX¨ is recommended for active immunization of all persons ≥ 9 months of age traveling to or living in areas of South
America and Africa where yellow fever infection is officially reported or to countries which require a certificate of vaccination
against yellow fever.5,6
Vaccination is also recommended for travel outside the urban areas of countries that do not officially report the disease but thatlie in the yellow fever endemic zone. In recent years, fatal cases of yellow fever have occurred among unvaccinated touristsvisiting rural areas within the yellow fever endemic zone.5 Laboratory personnel who might be exposed to virulent yellow fever virus by direct or indirect contact or by aerosols also shouldbe vaccinated.5 For simultaneous administration of other vaccines see DOSAGE AND ADMINISTRATION section.
Infants < 9 months of age and pregnant women should be considered for vaccination if traveling to areas experiencing ongoing
epidemic yellow fever when travel cannot be postponed and a high level of prevention against mosquito exposure is not
feasible. However, in no instance should infants < 4 months of age receive yellow fever vaccine because of the risk of encephalitis.5
(See CONTRAINDICATIONS, WARNINGS and PRECAUTIONS sections.)
United States vaccination certificates are valid for a period of 10 years commencing 10 days after initial vaccination or
revaccination.6 (See DOSAGE AND ADMINISTRATION section.)
As with any vaccine, vaccination with YF-VAX¨ may not protect 100% of susceptible individuals. CONTRAINDICATIONS
Since the yellow fever virus is propagated in chicken embryos, it should not be administered to an individual with a history of
hypersensitivity to egg, chicken protein, or to any other component of the vaccine. Generally, persons who are able to eat eggs or
egg products may receive the vaccine. (See PRECAUTIONS section for sensitivity testing.)5
Infection with yellow fever vaccine virus poses a theoretical risk of encephalitis to patients with immunosuppression inassociation with acquired immunodeficiency syndrome (AIDS) or other manifestations of human immunodeficiency virus (HIV)infection, leukemia, lymphoma, generalized malignancy, or to those whose immunologic responses are suppressed bycorticosteroids, alkylating drugs, antimetabolites, or radiation. Such patients should not be vaccinated. If travel to a yellow fever-infected zone is necessary, patients should be advised of the risk, instructed in methods for avoiding vector mosquitoes, andsupplied with vaccination waiver letters by their physicians.5,6 Low-dose (10 mg prednisone or equivalent) or short-term (< 2 weeks) corticosteroid therapy or intra-articular, bursal, or tendoninjections with corticosteroids should not be immunosuppressive and constitute no increased hazard to recipients of yellowfever vaccine. Persons who have had previously diagnosed asymptomatic HIV infections and who cannot avoid potentialexposure to yellow fever virus should be offered the choice of vaccination. Vaccinees should be monitored for possible adverseeffects. Since the vaccination of such persons may be less effective than that for non-HIV-infected persons, their neutralizingantibody response to vaccination may be desired before travel. For such determinations, the appropriate state healthdepartment or Centers for Disease Control and Prevention (CDC) (303-221-6400) may be contacted. Family members ofimmunosuppressed persons, who themselves have no contraindications, may receive yellow fever vaccine.5 Infants < 4 months of age should not be immunized because they are more susceptible to encephalitis temporally associated
with yellow fever vaccination than older children.5,6,7 (See INDICATIONS AND USAGE and WARNINGS sections.)
WARNINGS
This product contains dry natural latex rubber as follows:
The stopper to the vial contains dry natural latex rubber.
Infants < 9 months of age and pregnant women should not be vaccinated. The decision to immunize infants between 4 and 9months of age and pregnant women should be based upon estimates of the risk of exposure.5,6,7 Anaphylaxis may occur following the use of YF-VAX¨, even in individuals with no prior history of hypersensitivity to the vaccinecomponents. The clinical judgment of the responsible physician should prevail.
PRECAUTIONS
GENERAL
Care is to be taken by the health-care provider for the safe and effective use of YF-VAX¨.
EPINEPHRINE INJECTION (1:1000) ALWAYS MUST BE IMMEDIATELY AVAILABLE TO COMBAT UNEXPECTED ANAPHYLACTIC OR
OTHER ALLERGIC REACTIONS.

Prior to an injection of any vaccine, all known precautions should be taken to prevent side reactions. This includes a review ofthe patient’s history with respect to possible sensitivity to the vaccine or similar vaccines and to possible sensitivity to dry naturallatex rubber.
Health-care providers should obtain the previous immunization history of the vaccinee, and inquire about the current healthstatus of the vaccinee.
Administration of YF-VAX¨ is not contraindicated in individuals infected with HIV.7 A separate, sterile syringe and needle should be used for each patient to prevent transmission of hepatitis or other infectiousagents from person to person. Needles should not be recapped and should be properly disposed (e.g., sterilized or disposed inred hazardous waste containers).
INFORMATION FOR PATIENTSPatients, parents or guardians should be fully informed of the benefits and risks of immunization with YF-VAX¨.
Prior to administration of YF-VAX¨, patients, parents or guardians should be asked about the recent health status of the patientto be immunized.
The health-care provider, at an approved yellow fever vaccination center, should inform the patients, parents or guardians aboutthe significant adverse reactions that have been temporally associated with YF-VAX¨ administration and obtain informedconsent. Patients, parents or guardians should be instructed to report any serious adverse reactions to their health-care provider.
As part of the patient’s immunization record, the date, lot number and manufacturer of the vaccine administered should berecorded.8,9,10 Vaccinees should receive an International Certificate of Vaccination completed, signed, and validated with the center’s stampwhere the vaccine was given.
The US Department of Health and Human Services has established a Vaccine Adverse Event Reporting System (VAERS) to acceptall reports of suspected adverse events after the administration of any vaccine, including but not limited to the reporting ofevents required by the National Childhood Vaccine Injury Act of 1986.7,8 The VAERS toll-free number for forms and informationis 1-800-822-7967.8 HYPERSENSITIVITY REACTIONS
Since the yellow fever virus is propagated in chicken embryos, it should not be administered to an individual with a history of
hypersensitivity to egg or chicken protein. In some instances, although symptoms appear soon after a vaccine is administered,
differentiation between allergic reaction to the vaccine and reaction to an environmental allergen is impossible.11
Four types of hypersensitivity reactions are:111. allergic reactions to egg or egg-related antigens,2. mercury sensitivity in some recipients of immune globulins or vaccines,3. antibiotic-induced allergic reactions, and4. hypersensitivity to some component of the infectious agent or other vaccine components.
Less severe or localized manifestations of allergy to egg or to feathers are not contraindications to vaccine administration and donot usually warrant vaccine skin testing.11 An egg-sensitive individual can be tested with the vaccine before it is used in the following manner:111. Scratch, prick, or puncture test: a drop of 1:10 dilution of the vaccine in physiologic saline is applied at the site of a superficial scratch, prick, or puncture on the volar surface of the forearm. Positive (histamine) and negative (physiologicsaline) control tests should also be used. The test is read after 15 to 20 minutes. A positive test is a wheal 3 mm larger thanthat of the saline control, usually with surrounding erythema. The histamine control must be positive for valid interpretation.
If the result of this test is negative, an intradermal (ID) test is performed.
2. Intradermal test: a dose of 0.02 mL of a 1:100 dilution of the vaccine in physiologic saline is injected; positive and negative control skin tests are performed concurrently. A wheal 5 mm or larger than the negative control with surrounding erythema isconsidered a positive reaction. EPINEPHRINE INJECTION (1:1000) ALWAYS MUST BE IMMEDIATELY AVAILABLE TO COMBAT UNEXPECTED ANAPHYLACTIC OR
OTHER ALLERGIC REACTIONS.

DESENSITIZATION11
If the individual has a history of severe egg sensitivity and has a positive skin test to the vaccine, the individual may be given the
vaccine using a “desensitization” procedure if immunization is imperative. The following successive doses should be
administered subcutaneously at 15- to 20-minute intervals:
1. 0.05 mL of 1:10 dilution
2. 0.05 mL of full strength
3. 0.10 mL of full strength
4. 0.15 mL of full strength
5. 0.20 mL of full strength
This type of skin testing and “desensitization” should be undertaken only if supervised by a physician experienced in the
management of anaphylaxis and with necessary emergency equipment immediately available.
DRUG INTERACTIONSIn a prospective study of persons given yellow fever vaccine and 5 cc of commercially available immune globulin, no alterationof the immunologic response to yellow fever vaccine was detected when compared with controls.5,11,12 Studies have shown that the serologic response to yellow fever vaccine is not inhibited by the administration of certain othervaccines concurrently at separate sites or at various intervals of a few days to one month. Measles and yellow fever vaccines havebeen administered in combination with full efficacy of each of the components; Bacillus Calmette Guérin (BCG) and yellow fevervaccines have been administered simultaneously without interference. Additionally, severity of reactions to vaccination has notbeen amplified by the concurrent administration of yellow fever and other live virus vaccines. If live virus vaccines are not givenconcurrently, four weeks should elapse between sequential vaccinations.5 Some data have indicated that persons given yellow fever and cholera vaccines simultaneously or 1 to 3 weeks apart had lowerthan normal antibody responses to both vaccines.5 Unless there are time constraints, cholera and yellow fever vaccines shouldbe administered at a minimal interval of 3 weeks. If the vaccines cannot be administered at least 3 weeks apart, the vaccines canbe given simultaneously at separate sites or at any time within the 3-week interval.5 Hepatitis B and yellow fever vaccine may be given concurrently at separate sites.5 No data exist on possible interference betweenyellow fever and typhoid, paratyphoid, typhus, plague, rabies or Japanese encephalitis vaccines.5 Although chloroquine inhibits replication of yellow fever virus in vitro, it does not adversely affect antibody responses to
yellow fever vaccine in humans receiving antimalaria prophylaxis.5,13 (See DOSAGE AND ADMINISTRATION section.)
Usually, YF-VAX¨ should be administered at least one month apart from other live-virus vaccines. However, fieldobservations and clinical data indicate that simultaneous administration of the most widely used live-virus vaccines have notresulted in impaired antibody response or increased adverse reactions.7 Thus, if time is a critical factor for required vaccinations,the clinical judgment of the responsible physician should prevail.
CARCINOGENESIS, MUTAGENESIS, IMPAIRMENT OF FERTILITYYF-VAX¨ has not been evaluated for its carcinogenic, mutagenic potentials or impairment of fertility.
PREGNANCYREPRODUCTIVE STUDIES – PREGNANCY CATEGORY CAnimal reproduction studies have not been conducted with YF-VAX¨. It is also not known whether YF-VAX¨ can cause fetal harmwhen administered to a pregnant woman or can affect reproduction capacity. YF-VAX¨ should be given to a pregnant womanonly if clearly needed.
NURSING MOTHERSYellow fever virus is not excreted in breast milk following vaccination, and there is no contraindication for vaccinating breast-feeding mothers with yellow fever vaccine.6 PEDIATRIC USE
Safety and effectiveness of Yellow Fever Vaccine in infants below the age of 9 months have not been established. Therefore,
YF-VAX¨ is NOT recommended for infants < 9 months of age unless they live in or are traveling to a high-risk area. In NO instance
should infants
< 4 months of age receive yellow fever vaccine because of the risk of encephalitis.5 (See INDICATIONS AND
USAGE
and WARNINGS sections.)
ADVERSE REACTIONS
Adverse reactions to 17D yellow fever vaccine are generally mild. After vaccination, 2% to 5% of vaccinees have mild headaches,
myalgia, low-grade fevers, or other minor symptoms for 5 to 10 days. Fewer than 0.2% of the vaccinees curtail regular activities.
Immediate hypersensitivity reactions, characterized by rash, urticaria, and/or asthma, are uncommon (incidence <1/1,000,000)
and occur principally among persons with histories of egg allergy.5
Two cases of encephalitis temporally associated with vaccinations have been reported in the United States; in one fatal case, 17Dvirus was isolated from the brain.4,5 Anaphylaxis may occur following the use of YF-VAX¨, even in individuals with no prior history of hypersensitivity to the vaccinecomponents. EPINEPHRINE INJECTION (1:1000) ALWAYS MUST BE IMMEDIATELY AVAILABLE TO COMBAT UNEXPECTED ANAPHYLACTIC OR
OTHER ALLERGIC REACTIONS.

Reporting of Adverse Events
Reporting by patients, parents or guardians of all adverse events occurring after vaccine administration should be encouraged.
Adverse events following immunization with vaccine should be reported by the health-care provider to the US Department of
Health and Human Services (DHHS) Vaccine Adverse Event Reporting System (VAERS). Reporting forms and information about
reporting requirements or completion of the form can be obtained from VAERS through a toll-free number 1-800-822-7967.8
Health-care providers also should report these events to the Director of Scientific and Medical Affairs, Aventis Pasteur Inc.,
Discovery Drive, Swiftwater, PA 18370 or call 1-800-822-2463.

DOSAGE AND ADMINISTRATION
Parenteral drug products should be inspected visually for extraneous particulate matter and/or discoloration prior to
administration whenever solution and container permit. If these conditions exist, the vaccine should not be administered.
Reconstitute the vaccine using only the diluent supplied (Sodium Chloride Injection USP). The vaccine appears slightly opalescentand light orange in color after reconstitution. Draw the volume of the diluent, shown on the diluent label, into a suitable size syringeand inject into the vial containing the vaccine. Slowly add diluent to vaccine, let set for one to two minutes and then carefully swirlmixture until a uniform suspension is achieved. Avoid vigorous shaking as this tends to cause foaming of the suspension. Use vaccinewithin 60 minutes following reconstitution. All reconstituted vaccine and containers which remain unused after one hour must beproperly disposed (e.g., sterilized or disposed in red hazardous waste containers).5 Do not dilute reconstituted vaccine. SWIRL VACCINE WELL before withdrawing each dose. Administer the single immunizing dose of 0.5 mL subcutaneously at once. If immunization is imperative to an individual with a history of severe egg sensitivity and a positive skin test to the vaccine, see
DESENSITIZATION section.
Primary vaccination. For persons of all ages, a single subcutaneous injection of 0.5 mL of reconstituted vaccine (formulated tocontain not less than 5.04 Log10 Plaque Forming Units [PFU]) is administered.5 Immunity develops by the 10th day after primary Booster doses. The International Health Regulations require revaccination at intervals of 10 years. Revaccination boosts antibodytiter; however, evidence from several studies suggests that yellow fever vaccine immunity persists for at least 30 to 35 years andprobably for life.5 SIMULTANEOUS ADMINISTRATION OF OTHER VACCINESStudies have shown that the serologic response to yellow fever vaccine is not inhibited by the administration of certain othervaccines concurrently at separate sites or at various intervals of a few days to one month. Measles and yellow fever vaccines havebeen administered in combination with full efficacy of each of the components; Bacillus Calmette Guérin (BCG) and yellow fevervaccines have been administered simultaneously without interference. Additionally, severity of reactions to vaccination has notbeen amplified by the concurrent administration of yellow fever and other live virus vaccines. If live virus vaccines are not givenconcurrently, four weeks should elapse between sequential vaccinations.5 Some data have indicated that persons given yellow fever and cholera vaccines simultaneously or 1 to 3 weeks apart had lowerthan normal antibody responses to both vaccines.5 Unless there are time constraints, cholera and yellow fever vaccines shouldbe administered at a minimal interval of 3 weeks. If the vaccines cannot be administered at least 3 weeks apart, the vaccines canbe given simultaneously at separate sites or at any time within the 3-week interval.5 Hepatitis B and yellow fever vaccine may be given concurrently at separate sites.5 No data exist on possible interference betweenyellow fever and typhoid, paratyphoid, typhus, plague, rabies or Japanese encephalitis vaccines.5 HOW SUPPLIED
Vial, 1 Dose (5 per package) with vial of diluent (5 per package) for administration with needle and syringe. Product No. 49281-915-01
Vial, 5-Dose, with vial of diluent, for administration with needle and syringe. Product No. 49281-915-05
Vial, 20-Dose, with vial of diluent, for administration with needle and syringe (NOT to be used with jet injector). Product No. 49281-915-20
YF-VAX¨ (Yellow Fever Vaccine) in the United States is supplied only to designated Yellow Fever Vaccination Centersauthorized to issue valid certificates of Yellow Fever Vaccination. Location of the nearest Yellow Fever Vaccination Centersmay be obtained from the Centers for Disease Control and Prevention, Atlanta, GA 30333, state or local health departments,or the USPHS booklet “Immunization Information for International Travel” (obtainable from the Superintendent ofDocuments, US Government Printing Office, Washington, DC 20402).
STORAGE
Storage Temperature
Freeze-dried vaccine must be maintained continuously at a temperature between 0° – 5°C (32° – 41°F).
YF-VAX¨ does not contain a preservative, therefore all reconstituted vaccine and containers which remain unused after one hourmust be properly disposed (e.g., sterilized or disposed in red hazardous waste containers).5 Shipping TemperaturesYF-VAX¨ is shipped in a container with solid carbon dioxide; use is not recommended unless the shipping case contains some dryice upon arrival.
STABILITY STUDIES
STABILITY OF YF-VAX¨ (FREEZE-DRIED) AT ELEVATED TEMPERATURES1 The following information is provided for those countries or areas of the world where an adequate cold chain is a problem andinadvertent exposure to abnormal temperatures has occurred.
YF-VAX¨ is formulated to satisfy the current US potency requirements of not less than 5.04 Log10 Plaque Forming Units (PFU) per 0.5 mL dose and meets the minimum requirements of WHO.14 REFERENCES
1. Unpublished data available from Aventis Pasteur Inc.
2. Nasidi A, et al. Yellow fever vaccination and pregnancy: a four-year prospective study. Transactions of the Royal Society of Tropical Medicine and Hygiene 87: 337-339, 1993 3. Tsai TF, et al. Congenital yellow fever virus infection after immunization in pregnancy. J Infect Dis 168: 1520-1523, 19934. Jennings AD, et al. Analysis of a yellow fever virus isolated from a fatal case of vaccine-associated human encephalitis. J Infect 5. Recommendations of the Advisory Committee on Immunization Practices (ACIP). Yellow Fever Vaccine. MMWR 39: No. RR-6, 19906. Vaccination Certificate Requirements. Health information for international travel. US Department of Health and Human 7. ACIP. General recommendations on immunization. MMWR 38: 205-227, 19898. CDC. Vaccine Adverse Event Reporting System – United States. MMWR 39: 730-733, 19909. CDC. National Childhood Vaccine Injury Act: requirements for permanent vaccination records and for reporting of selected events after vaccination. MMWR 37: 197-200, 1988 10. Food and Drug Administration. New reporting requirements for vaccine adverse events. FDA Drug Bull 18 (2), 11. American Academy of Pediatrics. Report of the Committee on Infectious Diseases. 23rd ed. Elk Grove Village, IL, 199412. Kaplan JE, et al. The effect of immune globulin on the response to trivalent oral poliovirus and yellow fever vaccinations. Bull WHO Vol 62: 585-590, 1984 13. Tsai TF, et al. Chloroquine does not adversely affect the antibody response to yellow fever vaccine. J Infect Dis 154: 726, 198614. Requirements for yellow fever vaccine. WHO Technical Report Series 594, 1976 Manufactured by:
Aventis Pasteur Inc.

Source: http://u2.lege.net/whale.to/a/p/yfvax.pdf

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