Unit 7.4: Communicable Disease and Vaccination

• Topic 01

  Immunisation Schedule

  45 questions
• Topic 02

  Notifiable Diseases and Responsibilities

  39 questions
• Topic 03

  Outbreak Management Principles

  33 questions
• Topic 04

  Sexual Health and Blood-Borne Virus Prevention

  36 questions

A few questions from this unit, with the answer and a full explanation. The complete bank is available when you start practising.

1. A parent asks why their 6-month-old child has not yet had the MMR vaccine, since they have read it can be given earlier in some countries. What is the MOST appropriate explanation?

   • A
     The live virus in MMR poses too great a safety risk before the immune system has fully matured at 12 months
   • B
     Maternal antibodies transferred to the infant can neutralise the live MMR vaccine before 12 months, reducing its effectiveness
     Correct answer
   • C
     MMR cannot be co-administered with any of the vaccines already given before 12 months
   • D
     The MMR vaccine contains too many antigens for the immune system of a 6-month-old to process
   Explanation

   Maternal antibodies (immunoglobulins transferred across the placenta) can persist for several months after birth and may neutralise the live attenuated measles component of MMR if given too early, resulting in a suboptimal immune response.

   The UK schedule waits until 12 months when maternal antibody levels have waned.

   Some countries with high measles risk offer an earlier dose, then repeat at 12 months.

2. A nurse identifies a patient with suspected tuberculosis. What specific legal powers exist to manage a patient with TB who refuses treatment under the Public Health (Control of Disease) Act 1984?

   • A
     The attending nurse can legally detain the patient under common law if they believe the patient poses an immediate infection risk to others
   • B
     There are no legal powers to compel treatment for TB in England; all TB management is based on voluntary compliance
   • C
     TB is managed under the Mental Health Act 1983, which allows compulsory detention for patients who refuse treatment
   • D
     A local authority can apply to a magistrates' court for an order requiring the patient to be examined, isolated, or detained if they pose a risk to others
     Correct answer
   Explanation

   The Public Health (Control of Disease) Act 1984 (as amended) provides powers for a local authority to apply to a magistrates' court for orders relating to patients with certain infectious diseases, including TB.

   These orders can require the patient to be examined, isolated, or detained.

   They are used as a last resort when the patient poses a genuine risk to public health and has refused to cooperate with voluntary management.

   The Mental Health Act is a separate framework and does not apply to infectious disease refusal.

3. A healthcare worker had their last episode of vomiting on Monday at 6pm. They feel completely well by Tuesday morning and ask if they can return to work for the Tuesday evening shift, which begins at 7pm. Which of the following is the MOST appropriate response?

   • A
     No — the 48-hour exclusion period from the last symptom (6pm Monday) means the earliest return to work is 6pm Wednesday; the Tuesday evening shift is too early
     Correct answer
   • B
     No — the worker must remain off for 72 hours from the last episode of vomiting before returning to a clinical area
   • C
     Yes — if the worker has no further symptoms for 24 hours and lives alone with no vulnerable family contacts, they can return to work
   • D
     Yes — the 48-hour rule applies from the first episode of illness, not the last; if Monday was when they first became unwell, the exclusion would end Tuesday evening
   Explanation

   The 48-hour exclusion rule runs from the time of the LAST episode of diarrhoea or vomiting, not from when symptoms first began.

   The last episode was 6pm Monday; adding 48 hours gives 6pm Wednesday as the earliest safe return.

   The Tuesday evening shift (starting 7pm Tuesday) is only ~25 hours after the last episode — which falls well within the exclusion period.

   Feeling well is not sufficient; the time threshold must be met to minimise the risk of nosocomial transmission.