Vaccine

Aka: Vaccine, Vaccination, Immunization, Vaccine Safety, Immunization Contraindication, Vaccine Adverse Event Reporting System, VAERS

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II. Epidemiology

  1. For kindergarden entry, 94% of children are up to date in U.S. (79 to 98% depending on state)
  2. In the U.S., only 60% of teens were current on routine Vaccination pre-Covid19 in 2020 (trending down since then)
  3. References
    1. (2022) Presc Lett 29(8): 45-6
    2. Seither (2021) MMWR Morb Mortal Wkly Rep 70(3):75-82 +PMID: 33476312 [PubMed]

III. Background

  1. Vaccination was described by Edward Jenner in England, 1796
    1. Demonstrated Cowpox innoculation prevented Smallpox
    2. Term Vaccination is derived from vacca (cow)
  2. Vaccination is based on the development of active Immunity
    1. Active Immunity is a function of the adaptive immune sytem and occurs after recovering from an illness
    2. Vaccination exposes patients to an attenuated Microbe or its Antigens and results in similar Immunity
    3. Vaccines offer Immunity without the risk of mortality or morbidity associated with the natural infection
  3. Allergen Immunotherapy
    1. Immunotherapy with allergan extracts is based on the same active Immunity process as for Vaccination
  4. Passive Immunity, in contrast, relies on an infusion of antibodies from others
    1. Mothers (trans-placental lasting for the first 3-6 months, Breast Feeding)
    2. Intravenous Gamma Globulin (IVIG) from pooled donors
    3. Specific antibodies

IV. Mechanism

  1. Primary immune response
    1. Onset in the first week of exposure to infection or Immunization
    2. IgM Antibody to Microbe peaks after the first 2 weeks and then gradually decreases
  2. Secondary immune response
    1. Memory cells (B Cell type) form after the primary immune response
    2. IgG (and IgA) high affinity Antibody to Microbe increases to high, sustained levels on second Antigen exposure

V. Types

  1. Live Attenuated Vaccine
    1. Highly effective, resulting in prolonged or even life-long Immunity
    2. Contains live, but attenuated organism from which Immunocompromised patients may become ill
  2. Killed Bacteria Vaccine
    1. Shorter duration of protection than with Live Attenuated Vaccine
    2. Vaccine contains either whole killed Bacteria or its subunit Antigens (e.g. toxins, DNA)
  3. Bacterial Polysaccharide Vaccine
    1. Bacterial Polysaccharide (e.g. Pneumococcus) is conjugated with a carrier Protein (e.g. toxoid molecule)
    2. Carrier Protein conjugation allows for T Helper Cell Activation
  4. Toxoid Vaccine
    1. Attenuated Bacterial Exotoxins (e.g. Tetanus Toxoid) stimulate active Immunity against the organism's toxins

VI. Precautions: Safety

  1. Vaccines are safe
    1. Serious Allergic Reaction occur in less than 4 in one million with DTaP Vaccine, MMR Vaccine, Varicella Vaccine
    2. Most pediatric Vaccines do NOT contain thimerosol (and thimerosol)
    3. Of the 6000 daily Antigen exposures daily, a full Primary Series only exposes children to a total of 150 Antigens
  2. Vaccines prevent life threatening illness
    1. Tetanus will kill one child in 10 who contract the infection
    2. Measles will kill one child in 1000 who contract the infection
    3. Varicella will kill one older child in 100,000 who contract the infection
  3. Undervaccination puts community health at risk
    1. Take every opportunity to catch up Vaccinations
    2. Undervaccination associated with the 2020 Coronavirus pandemic is a significant risk for other outbreaks
      1. Santoli (2020) MMWR Morb Mortal Wkly Rep 69:591-3 [PubMed]
        1. https://www.cdc.gov/mmwr/volumes/69/wr/mm6919e2.htm?s_cid=mm6919e2_w
    3. Undervaccination has been associated with resurgence of Measles
      1. Gahr (2014) Pediatrics 134(1): e220-8 +PMID:24913790 [PubMed]
    4. Adolescents frequently miss Vaccines with significant preventive potential
      1. HPV Vaccine (Gardasil Vaccine)
      2. Meningococcal Vaccine (Menactra, Menveo)
      3. Tdap Vaccine (Adacel)
      4. Influenza Vaccine
  4. Vaccine refusal
    1. Listen to concerns without minimizing concerns
    2. Explain risks and benefits
    3. Consider asking parents to sign a "Refusal to Vaccinate"
    4. Consider applying appropriate billing codes
      1. V64.05 Vaccine refusal by Caregiver
      2. V64.07 Vaccine refusal for religious reasons
  5. Avoid prophylactic Analgesics and antipyretics at the time of Immunization (per CDC)
    1. Antipyretics do not reduce the risk of Febrile Seizure
    2. Risk of decreased immunogenic response to Vaccination
      1. Prymula (2009) Lancet 374(9698): 1339-50 [PubMed]
    3. However, no definitive data on whether Analgesics reduce overall efficacy of Vaccination
      1. NSAIDS and Acetaminophen may be used as needed for post-Vaccination symptoms (pain, fever)
      2. Cool compresses may also be applied as needed
  6. Multiple Vaccines may be given on the same day
    1. Inject each Vaccine into different sites (at least 1 inch apart)
    2. Inject more painful Vaccines (e.g. DTaP) as the only Vaccines in a dominant arm
      1. Encourages frequent use of the extremity, resulting in more rapid resolution of pain
    3. Do not mix Vaccines together in the same syringe
      1. Exception: Pre-combined Vaccines by manufacturer (e.g. Pediarix - DTaP, Hep B, IPV)
  7. Vaccine Adverse Event Reporting System (VAERS)
    1. Vaccinations are closely monitored for adverse events in U.S. via VAERS system
    2. Vaccination adverse events may be reported by anyone including parent and patient self-report
      1. Individual reports may be inaccurate and do not reflect causality
      2. CDC and FDA monitor the data to identify patterns and trends with specific Vaccinations
    3. VAERS Website
      1. https://vaers.hhs.gov/
  8. References
    1. (2015) Presc Lett 22(3): 13
    2. (2023) Presc Lett 30(11): 61-2

VII. Contraindications: Vaccination

  1. True contraindications to Vaccination
    1. Current moderate to severe illness
    2. Anaphylaxis to Vaccine or Vaccine constituent (see below)
      1. Anaphylaxis to Vaccination is rare (<1 in one million doses)
      2. Obtain immediate type allergy Skin Testing if Vaccination is suspected for severe allergy or Anaphylaxis
  2. Conditions that do not contraindicate Vaccine
    1. Moderate inflammation at prior Immunization site
    2. Moderate fever following prior Vaccination
    3. Current Antibiotic usage
    4. Recovering from illness or recent exposure to illness
    5. Prematurity (no change in dosage)
    6. Unvaccinated household contact
    7. Pregnancy of household contact

VIII. Preparations

  1. Primary Series Vaccines
    1. See Immunization Schedule in Children
    2. Haemophilus Influenzae Type B (Hib Vaccine)
    3. Inactivated Polio Vaccine (EIPV)
    4. Pneumococcal Conjugate Vaccine (PCV, Prevnar)
    5. Measles Mumps Rubella Vaccine (MMR)
    6. Varicella Vaccine
    7. Rotavirus Vaccine
    8. DiphtheriaTetanus acellular Pertusis (DTaP Vaccine)
    9. Hepatitis B Vaccine (HepB Vaccine)
    10. Hepatitis A Vaccine
  2. Teen Vaccines (typically at age 11 years)
    1. Tetanus Diptheria acellular Pertussis (Tdap Vaccine)
    2. Meningococcal Conjugate Vaccine (MCV4)
    3. Human Papillomavirus Vaccine
  3. Adult Vaccines
    1. Tetanus Diptheria Vaccine (Td Vaccine)
    2. Tetanus Diptheria Acellular Pertussis Vaccine (Tdap, Adacel, Boostrix)
    3. Human Papillomavirus Vaccine (Gardasil)
  4. Older adult Vaccines
    1. Pneumococcal Conjugate Vaccine (e.g. PCV21)
    2. Shingles Vaccine
  5. Annual Vaccines and Other Episodic Vaccines
    1. Influenza Vaccine
    2. Covid-19 Vaccine

IX. Precautions: Vaccine Additives

  1. Potential allergans for those with known Anaphylaxis to these agents
  2. Neomycin
    1. Varicella Vaccine
    2. Measles Mumps Rubella Vaccine (MMR Vaccine)
    3. Inactivated Polio Vaccine
  3. Gelatin
    1. Varicella
    2. Measles Mumps Rubella Vaccine (MMR Vaccine)
  4. Egg Protein
    1. Inactivated Influenza Vaccine (use egg-free trivalent Inactivated Influenza Vaccine instead)
    2. Egg allergy is not a contraindication to Measles Mumps Rubella Vaccine (MMR Vaccine)
  5. Thimerisal
    1. Preservative in Vaccinations used since 1930s
    2. Contains small amount of Mercury, but no association with any neurologic disorder including Autism
    3. Removed from all Vaccinations in U.S. except for multi-dose Inactivated Influenza Vaccine
  6. Latex
    1. Infarix (DTaP Vaccine)
    2. Menomune, Bexsero (Meningococcal Vaccine)
    3. Rotarix (Rotavirus Vaccine oral applicator)

X. Precautions: Maintaining Vaccine Efficacy

  1. Maintain the cold chain prior to Vaccine administration
    1. Most Vaccines must be maintained in a tightly Temperature controlled refrigerator to ensure Vaccine efficacy
  2. Consider a back-up generator to protect Vaccines if power fails
  3. Manufacturers can give guidance if vaccine Temperatures varied from those recommended
  4. Use a refrigerator designed for Vaccines
  5. Monitor refrigerator Temperature twice daily or more with buffered probe Thermometer (e.g. glycol-encased)
    1. Continuous monitoring and automatic recording is preferred
    2. Thermometer ideally alarms when Temperature falls out of safe range
  6. Keep Vaccines on the middle of the shelves (not in the door or along the back wall) to maintain consistent Temperature
  7. Water bottles or freezer packs can help stabilize the Temperature (but do not store food with Vaccines)
  8. References
    1. (2012) Presc Lett 19(12): 70

XI. Precautions: Maintaining Vaccine Safety

  1. Prepare a Vaccination delivery plan that is followed by all staff
    1. Preparation of supplies
    2. Patient questionnaires specific to Vaccines given (keep updated)
    3. Documentation and checklists
    4. Process for drawing up doses
  2. Prevent medication errors
    1. Consider administering only certain Vaccine brands on one day, and a different Vaccine brand on another day
    2. Store refrigerated Vaccines in well marked, well defined regions of a refrigerator
    3. Read medication labels carefully
    4. Staff should double check one another when possible for correct medication and dose
    5. Label each prepared syringe with drug contents, concentration, and dose

XII. Resources

  1. WHO Vaccine Safety
    1. https://www.who.int/vaccine_safety/initiative/tools/vaccinfosheets/en/
  2. CDC Vaccine Safety
    1. https://www.cdc.gov/vaccinesafety/index.html
  3. Healthy Children (AAP) Vaccine Safety
    1. https://www.healthychildren.org/English/safety-prevention/immunizations/Pages/Vaccine-Safety-The-Facts.aspx
  4. CDC Immunization Schedules
    1. https://www.cdc.gov/vaccines/hcp/imz-schedules/index.html
  5. Vaccines for Travelers
    1. https://wwwnc.cdc.gov/travel
  6. Vaccine Adverse Events
    1. https://vaers.hhs.gov/
  7. Vaccine Licensing and Safety Information (FDA)
    1. https://www.fda.gov/vaccines-blood-biologics/vaccines
  8. ACIP Vaccine Guidelines
    1. https://www.cdc.gov/vaccines/hcp/acip-recs/

XIII. References

  1. Mahmoudi (2014) Immunology Made Ridiculously Simple, MedMaster, Miami, FL
  2. Spencer (2017) Am Fam Physician 95(12): 786-94 [PubMed]
  3. (2022) Presc Lett 29(10): 58

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Related Studies

Ontology: Vaccination (C0042196)

Definition (NCI_NCI-GLOSS) Treatment with a vaccine.
Definition (NCI) Administration of vaccines to stimulate the host's immune response. This includes any preparation intended for active immunological prophylaxis or treatment.
Definition (MSH) Administration of vaccines to stimulate the host's immune response. This includes any preparation intended for active immunological prophylaxis.
Concepts Therapeutic or Preventive Procedure (T061)
MSH D014611
SnomedCT 170310008, 147541002, 33879002
CPT 90749
LNC LP29692-8, MTHU000146
Dutch profylactische vaccinatie, vaccinatie, Vaccinatie
French Vaccination prophylactique, Vaccination
German prophylaktische Impfung, Impfung, Vakzination
Italian Vaccinazione profilattica, Vaccinazione
Portuguese Vacinação profiláctica, Vacinação
Spanish Vacunación profiláctica, inoculación, vacunación, Vacunación
Japanese ワクチン接種, 予防ワクチン接種, ﾜｸﾁﾝｾｯｼｭ, ﾖﾎﾞｳﾜｸﾁﾝｾｯｼｭ
Swedish Vaccination
Czech očkování, vakcinace, Vakcinace, Preventivní očkování
Finnish Rokotus
Russian VAKTSINATSIIA, IMMUNIZATSIIA AKTIVNAIA, ВАКЦИНАЦИЯ, ИММУНИЗАЦИЯ АКТИВНАЯ
English vaccinations, vaccinations (medication), vaccinations [use for free text], Prophylactic vaccination, VACCIN, immunisation, inoculations, active immunization, immunization, vaccination, inoculation, Vaccine, Vaccinations, Inoculations - prophylactic, Inoculation, Vaccination, NOS, Inoculation, NOS, Vaccination, Vaccination NOS
Croatian CIJEPLJENJE
Polish Uodpornianie czynne, Szczepienia BCG, Szczepienia ochronne
Hungarian Prophylactikus vakcináció, Vakcináció
Norwegian Vaksinasjon, Vaksinasjoner
Derived from the NIH UMLS (Unified Medical Language System)

Ontology: Vaccines (C0042210)

Definition (NCI) Preparations containing substances with antigenic properties administered to activate the immune system, thereby inducing an immune response. Vaccines range from inactivated or attenuated microorganisms (bacteria and viruses), enhanced autologous tumor cells, tumor antigens or epitopes that are used to elicit host immune responses. Vaccines are used for the prevention, amelioration, or treatment of infectious diseases and cancer.
Definition (NCI_NCI-GLOSS) A substance or group of substances meant to cause the immune system to respond to a tumor or to microorganisms, such as bacteria or viruses. A vaccine can help the body recognize and destroy cancer cells or microorganisms.
Definition (MSH) Suspensions of killed or attenuated microorganisms (bacteria, viruses, fungi, protozoa, or rickettsiae), antigenic proteins derived from them, or synthetic constructs, administered for the prevention, amelioration, or treatment of infectious and other diseases.
Definition (CSP) prophylactic or therapeutic preparation given to produce immune response to pathogenic organisms or substances; vaccines are used not only in infectious disease prevention and treatment, but in neoplastic and autoimmune disease treatment, control of fertility, drug abuse control etc.
Concepts Pharmacologic Substance (T121) , Immunologic Factor (T129)
MSH D014612
SnomedCT 71181003, 398827000
LNC LP30374-0, MTHU014526, LA20283-0
Swedish Vacciner
Czech vakcíny
Finnish Rokotteet
Russian VAKTSINY, ВАКЦИНЫ
English vaccines (medication), vaccines, [IM100] VACCINES, Vaccines [Chemical/Ingredient], vaccine, vaccine product, VACCINES, Vaccine (product), Vaccine (substance), Vaccine, Vaccine, NOS, Vaccines
Croatian CJEPIVA
Polish Szczepionki
Spanish vacuna (producto), vacuna (sustancia), vacuna, Vacunas
French Vaccins
German Impfstoffe, Vakzine
Italian Vaccini
Portuguese Vacinas
Derived from the NIH UMLS (Unified Medical Language System)

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