Flu
Vaccines
biological preparation to stimulate immune system to develop protection against a specific disease → from virus or bacteria
contains:
dead or weakened pathogen
parts of pathogen - protein spikes in certain viruses
genetic material like mRNA
toxins are then made harmless → toxoid
how vaccines work:
prime immune system thats similar to bodys natural primary and secondary response
primary:
vaccine is first administered and mimics initial exposure to pathogen
immune system responds by producing antibodies and memory cells specific to antigens in vaccine
triggering the same response a primary response would act if it was to encounter the actual pathogen
secondary:
at 2nd exposure to same antigen through booster or actual infection - immune system would act fast.
due to presence of memory cells that were generated during primary response - similar to how body reacts more efficiently during real infection
clinical applications of vaccines
routine immunisation process; vaccines administered to children and adults as routine schedule to prevent diseases like measles, mumps and rubella
travel vaccines: specific vaccines are recommended or required for travelers to certain regions to protect against regional diseases
outbreak control: vaccines used to control spread of disease in outbreaks
cancer prevention: some vaccines like HPV prevent cancers caused by viruses
Influenza
myxovirus → mucin virus
attack mucus membrane and reside in nucleus of host mucus cell
covered in hemagglutinin spikes to allow virus to bind to host cell and fuse the viral envelop with host cell membrane
they release neuraminidase enzyme to break down mucoproteins to help virus move through other mucus membranes
influenza classified into A, B and C → A+B are most common human flu epidemics
peak during winter months as that is its favourable condition
virus mutation - mutated through antigenic drift and shift = new strains
transmission and incubation
spread through airborne droplets and direct contact with contaminated surfaces
flu incubation period usually 1-4 days before symptoms appear
most contagious from day 1-7 after symptoms appear
good hygiene, face masks, flu vaccines help reduce transmission risk
symptoms and complications
symptoms: fever, chills, coughs, sore throat, muscle aches, fatigue, headache and nasal congester
serious complications like pneumonia, bronchitis, asthma and heart disease
those who are vulnerable are at risk of severe outcomes
public health and vaccination
increased hospital admissions, gp visits, and strains emergency services
vulnerable populations are at risk of complications
infection leads to loss of productivity, increased healthcare, increased cost etc
types of flu vaccines
inactivated flu - killed virus particles given IM injection for those who are immunocompromised
live attenuated - weakened virus and delivered as nasal spray and usually for ages 2-18
recombinant flu - use of recombinant DNA and egg free for those with egg allergies
annual vaccine update: updated yearly to match the new strains and remain vital
vaccination service:
free flu service to seniors, pregnant women, chronic patients and frontline healthcare workers
service delivery channels - at community pharmacies, gp and mobile clinics to maximise accessibility
usually administered against prescription by prescriber, PGD or PSD
green book:
provides latest info on vaccine preventable disease, immunisation, vaccine storage and admin, criteria and risks and guidelines for healthcare workers.
side effects and risks:
usually mild and temporary
sore arm
mild fever
fatigue
headache
allergic reaction
training:
self declare competency - but need minimal national standards and core of immunisation
sign both competence declaration and statement
be able to gain consent and ensure confidentiality
produce SOPs
needle stick injury procedures
anaphylaxis telephone card and pack
indemnity insurance
clinical waste arrangment
patient engagement and review:
patients worry about vaccine safety, side effects and effectiveness which affects patient decision
need to educate and dispel myth to reduce vaccine through evidence based communication
need to be convenient, professional and empathetic for positive patient experience
Questions
Single Best Answer (SBA) Questions
Question 1.
The primary immunological mechanism by which a vaccine provides protection is through the generation of:
a) High levels of inflammatory cytokines during the injection.
b) A rapid and robust secondary immune response upon pathogen exposure.
c) A non-specific innate immune reaction.
d) Immediate, high-titer antibodies that last a lifetime.
Answer:
b) A rapid and robust secondary immune response upon pathogen exposure.
Your notes correctly explain that vaccines mimic the primary response, leading to the creation of memory cells. Upon real infection, these memory cells mount a faster, stronger secondary response, preventing disease.
Question 2.
Why is the influenza vaccine updated annually?
a) To combat a gradual loss of vaccine potency in storage.
b) Because immunity from the vaccine wanes completely after one year.
c) To match the circulating strains of the virus, which mutate through antigenic drift.
d) To change the administration route from intramuscular to intranasal.
Answer:
c) To match the circulating strains of the virus, which mutate through antigenic drift.
Your notes accurately describe "virus mutation - mutated through antigenic drift and shift" and state the vaccine is "updated yearly to match the new strains." Antigenic drift is the gradual change that necessitates the annual update.
Question 3.
According to the UK Green Book, which of the following patients is eligible for a FREE NHS flu vaccine at a community pharmacy?
a) A healthy 30-year-old with no underlying conditions.
b) A 25-year-old with well-controlled asthma.
c) A 50-year-old construction worker.
d) A 65-year-old retiree.
Answer:
d) A 65-year-old retiree.
Your notes state the "free flu service [is for] seniors, pregnant women, chronic patients..." The age threshold is a key eligibility criterion, typically starting at 65 years old. While some chronic conditions like asthma (b) also qualify, the clearest and most universal answer based on the notes is age.
Question 4.
A patient is concerned about egg allergies and the flu vaccine. Which type of flu vaccine is specifically designed to be safe for them?
a) Inactivated flu vaccine
b) Live attenuated intranasal vaccine
c) Recombinant flu vaccine
d) Any vaccine administered under close supervision
Answer:
c) Recombinant flu vaccine
Your notes explicitly state that the recombinant flu vaccine is "egg free for those with egg allergies." This is a crucial piece of product-specific knowledge for a pharmacist.
Extended Matching Questions (EMQ)
Questions 5-7:
For each patient description, select the MOST appropriate type of influenza vaccine.
Options:
A. Inactivated Influenza Vaccine (IM injection)
B. Live Attenuated Influenza Vaccine (Nasal Spray)
C. Recombinant Influenza Vaccine (IM injection)
D. No influenza vaccine is recommended.
Question 5.
A 45-year-old patient with a confirmed severe anaphylaxis to eggs.
Answer:
C. Recombinant Influenza Vaccine (IM injection)
As per the previous question, this is the egg-free option and is licensed for adults 18 and over.
Question 6.
A healthy 10-year-old child brought in for a routine flu vaccination.
Answer:
B. Live Attenuated Influenza Vaccine (Nasal Spray)
Your notes state the live attenuated vaccine is "usually for ages 2-18." This is the preferred option in the UK for children in this age group as it provides better mucosal immunity and is needle-free.
Question 7.
A 70-year-old patient receiving chemotherapy for lymphoma.
Answer:
A. Inactivated Influenza Vaccine (IM injection)
Your notes specify the inactivated vaccine is for "those who are immunocompromised." The live vaccine is contraindicated in immunocompromised individuals due to the risk of infection from the weakened virus.
Clinical Scenarios (OSCE/Patient Style)
Scenario 1: The Hesitant Patient
Patient: "I don't think I need the flu jab. I'm healthy, and last time I had it, I got a sore arm and felt a bit poorly for a day. I heard it can even give you the flu."
How do you, as the pharmacist, respond?
* Empathise and Validate: "It's very common to feel that way, and thank you for being honest. A sore arm and feeling a bit under the weather for a day are actually normal signs that your immune system is working and building up protection."
* Educate and Correct Misinformation: "It's really important to know that the injected flu vaccine given to adults contains a killed virus. It is impossible for it to give you the flu. The live nasal spray for children contains a weakened virus that cannot cause flu either."
* Highlight the Benefits: "Even for healthy people, the flu can be a serious illness, leading to time off work and, in some cases, complications like pneumonia. By getting vaccinated, you're not only protecting yourself but also helping to protect those around you who may be more vulnerable, like elderly relatives or babies."
* Empower: "The decision is yours, but I can assure you that the vaccine is safe, effective, and the best defence we have."
Scenario 2: Anaphylaxis Preparedness
Prior to starting your flu vaccination clinic, your supervisor asks you: "What are the essential components of our anaphylaxis management procedure?"
What key points would you confirm are in place?
* Immediate Access to Kit: "We must have a dedicated and easily accessible anaphylaxis pack. This contains pre-drawn Adrenaline (1:1000) IM injections, along with other emergency medicines like antihistamines and hydrocortisone."
* Staff Training: "All vaccinating staff must be trained in recognising the signs of anaphylaxis (e.g., difficulty breathing, swelling, rapid pulse) and be competent in administering IM adrenaline."
* Emergency Protocol: "Our SOP must include an immediate call to 999 for an ambulance if anaphylaxis is suspected, as this is a medical emergency. The patient should not be left alone."
* Documentation: "We have a procedure for completing a clinical incident form following any such event."
Service Delivery & Professional Practice
Question 8: Legal and Professional Requirements
A community pharmacist wishes to start offering a private flu vaccination service. List four key professional or legal requirements they must fulfil before commencing, as per your notes.
Answer:
Based on your notes, the requirements include:
1. Self-declaration of Competency: The pharmacist must have undertaken appropriate training and self-declare as competent in vaccination.
2. Signing a Competence Declaration: A formal statement of competence must be signed.
3. Patient Group Direction (PGD) or Prescription: They must have a legal basis to supply/administer the vaccine, either via a PSD (for private service) or a PGD (for NHS).
4. Indemnity Insurance: Ensure professional indemnity insurance covers the vaccination activity.
5. Clinical Waste Arrangements: Have a contract in place for the disposal of clinical waste, including used needles and syringes.
6. SOPs and Emergency Procedures: Have written Standard Operating Procedures (SOPs) covering the entire process, including management of needle-stick injuries and anaphylaxis.
Question 9: Vaccine Mechanism Matching
Match the vaccine component to its description.
1. Toxoid | 2. Live Attenuated | 3. mRNA | 4. Inactivated
Descriptions:
A. Weakened form of the pathogen that cannot cause disease in healthy hosts.
B. A killed version of the whole pathogen.
C. Harmless version of a bacterial toxin.
D. Genetic material that instructs the body to produce a specific viral protein.
Answer:
* 1 - C (Toxoid)
* 2 - A (Live Attenuated)
* 3 - D (mRNA)
* 4 - B (Inactivated)