Chapter 20 & 21: Immunization/ Travelers Flashcards
Vaccine Resources
■ FDA
■ The Advisory Committee on Immunization Practices (ACIP) provides the recommendations for vaccine administration in children and adults
■ CDC approves the ACIP recommendations and publishes them in the CDC’s Morbidity and Mortality Weekly Report (MMWR) and The Pink Book
(Epidemiology and Prevention of Vaccine-Preventable Diseases)
What is the primary function of the immune system, and how does it achieve immunity against foreign substances?
The immune system distinguishes between self and non-self substances (antigens) and produces antibodies (immunoglobulins) to fight off foreign antigens, providing immunity. When antigens are detected, antibodies are generated to destroy them.
Immunity is acquired actively or passively… Explain Active Immunity vs. Passive Immunity
Active Immunity: From the person’s own immune
system (from vaccines or fighting an infection). Lasts a long time, often a lifetime.
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Passive Immunity:Receiving immunoglobulins from another individual, such as through pooled lg or maternal transfer to a baby, provides temporary immunity. These antibodies decrease over time as the individual’s own antibody production increases. Intravenous immunoglobulin (IVIG) offers pre-made antibodies for rapid immunity, useful in cases like immediate protection against rabies after exposure to the virus
What are the key differences between live attenuated and inactivated vaccines, and why are live attenuated vaccines not recommended for certain individuals?
Live attenuated vaccines are modified from disease-causing viruses or bacteria in labs, able to replicate and confer immunity without causing severe illness. They closely mimic the actual disease, eliciting a robust immune response. However, they’re not recommended for immunocompromised or pregnant individuals due to potential uncontrolled replication of the pathogen.
Inactivated vaccines can consist of whole or partial viruses or bacteria. Immunity from these vaccines may decline over time, necessitating booster doses to maintain effectiveness.
Polysaccharide Vaccines
Polysaccharide vaccines extract sugar molecules from the outer layer of encapsulated bacteria, like pneumococcal serotypes. However, they typically elicit a weak immune response in children under 2 years of age.
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Ex: Pneumococcal Polysaccharide Vaccine (Pneumovax 23)
Conjugate Vaccines
Conjugate vaccines combine polysaccharide molecules from encapsulated bacteria with carrier proteins. This conjugation enhances the immune response in infants and improves the antibody booster response to multiple vaccine doses.
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Ex: Pneumococcal Conjugate Vaccine (Prevnar 13),
Meningococcal Conjugate (Menactra, Menveo)
Recombinant Vaccines
A gene segment of a protein from the organism is inserted into the gene of another cell, such as a yeast cell, where it replicates.
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Ex: Human Papillomavirus Vaccine (Gardasil 9), Recombinant Influenza Vaccine (FluBfok Quadrivalent)
Toxoid Vaccine
The vaccine targets toxin produced by disease.
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Ex: Diptheria Toxoid Vaccine
mRNA Vaccine
The vaccine gives instruction to the body’s cells to produce a protein specific to the pathogen, which triggers immune response
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Ex. COVID-19 vaccine
Examples of Live Vaccines
Remember: MICRO-VY
- MMR
- Intranasal Influenza
- Cholera
- Rotavirus
- Oral Typhoid
- Varicella
- Yellow Fever
Vaccine Timing and Spacing
LIVE VACCINES AND THE TB SKIN TEST?: How can the risk of false-negative results in the tuberculin skin test (TST) be minimized when live vaccines are involved
The tuberculin skin test (TST), also known as a purified protein derivative (PPD) test, detects latent tuberculosis (TB). Live vaccines can lead to false-negative results. Strategies to minimize this risk include:
- Co-administering the live vaccine with the skin test.
- Waiting for 4 weeks after a live vaccine before conducting the skin test.
- Conducting the skin test first, waiting 48-72 hours for results, and then administering the live vaccine.
Vaccine Adverse Reaction: What measures should be taken to minimize adverse reactions to vaccines, and how should healthcare professionals handle severe reactions when administering vaccines?
Vaccines can cause adverse reactions, ranging from mild to severe, including anaphylaxis. Screening for precautions and contraindications is crucial to minimize severe reactions. Patients should be monitored for at least 15 minutes post-vaccination for signs of allergic reactions. Pharmacists administering vaccines must have an emergency management protocol in place for severe reactions until medical help arrives. Any adverse reactions requiring assistance should be reported to the FDA’s Vaccine Adverse Event Reporting System (VAERS).
Vaccines
Minor Allergic Reaction: Treatment/ Approach
Minor allergic reactions will resolve quickly and
can be treated with diphenhydramine (OTC) or hydroxyzine (prescription). A minor reaction is not a contraindication to future vaccination.
Severe Allergic Reactions (very rare): anaphlaxis; what are the symptoms?
Symptoms, occurring within minutes, include hives, throat swelling, breathing difficulties, abdominal cramps, and low blood pressure.
Invalid C/I to Vaccination: Vaccines may be given in these following situation
Note: Pregnancy and Immunocomp are 2 most important C/I to live vaccines!
Severe Allergic Reaction: Managment/ Emergency Protocol
- Administer aqueous epinephrine 1 mg/mL intramuscularly, with a dose of 0.01 mg/kg up to a maximum of 0.5 mg per dose for adults. (at least 3 doses should be avalible at pharmacy) Multiple doses may be required, spaced 5-15 minutes apart.
- Diphenhydramine can be administered to reduce swelling and itching. However, oral administration of medications is not advisable if there’s airway swelling due to a risk of choking.
- Position the patient supine unless there’s breathing difficulty. Elevating the head can aid breathing, but ensure blood pressure remains adequate.
- Perform CPR if necessary. Pharmacists administering vaccines should hold current basic life support (BLS or CPR) certification.
- Record all vital signs and medications administered.
Vaccination For Special Group
Infants and Children
Vaccination For Special Group
Adolescents and Young Adults
Meningococcal vaccine (MCV4; Menactra; Menveo; or MenQuadfi)
Vaccination For Special Group
Pregnancy
■ Live vaccines are contraindicated
■ Influenza vaccine, inactivated (not live), can be given in any trimester
■ Tdap x 1 with each pregnancy (weeks 27-36, optimally)
Vaccination For Special Group
Older Adults
Vaccination For Special Group
Diabetes
Vaccination For Special Group
Healthcare Professionals
Vaccination For Special Group
Sickle Cell Disease/ asplenia
Vaccination For Special Group
Immunodeficiency
Vaccination For Adults
Influenza
Annually for all patients 6 months and up