The Flu Jab

Published: October 2017

The flu jab

Flu can be unpleasant, but if you are otherwise healthy it will usually clear up on its own within a week.

However, flu can be more severe in certain people, such as:

  • anyone aged 65 and over

  • pregnant women

  • children and adults with an underlying health condition (particularly long-term heart or respiratory disease)

  • children and adults with weakened immune systems

Anyone in these risk groups is more likely to develop potentially serious complications of flu, such as pneumonia (a lung infection), so it's recommended that they have a flu vaccine every year to protect them. 

 

How effective is the flu jab?

Flu vaccine is the best protection we have against an unpredictable virus that can cause unpleasant illness in children and severe illness and death among at-risk groups, including older people, pregnant women and those with an underlying medical health condition.

Studies have shown that the flu jab does work and will help prevent you getting the flu. It won't stop all flu viruses and the level of protection may vary between people, so it's not a 100% guarantee that you'll be flu-free, but if you do get flu after vaccination it's likely to be milder and shorter-lived than it would otherwise have been.

There is also evidence to suggest that the flu jab can reduce your risk of having a stroke.

Over time, protection from the injected flu vaccine gradually decreases and flu strains often change. So new flu vaccines are produced each year which is why people advised to have the flu jab need it every year too.

 

Flu jab side effects

Serious side effects of the injected flu vaccine are very rare. You may have a slight temperature and aching muscles for a couple of days after having the jab, and your arm may be a bit sore where you were injected.

 

When to have a flu jab

The best time to have a flu vaccine is in the autumn, from the beginning of October to early November.

The flu jab for 2015/16

Each year, the viruses that are most likely to cause flu are identified in advance and vaccines are made to match them as closely as possible. The vaccines are recommended by the World Health Organization (WHO).

The WHO has announced that the 2015/16 flu vaccine will protect against three types of flu virus:

  • A/H1N1 – the strain of flu that caused the swine flu pandemic in 2009

  • A/H3N2 – a strain of flu that can infect birds and mammals and was active in 2011

  • B/Phuket/3073/2013

 

Is there anyone who shouldn't have the flu jab?

Most adults can have the injected flu vaccine, but you should avoid it if you have had a serious allergic reaction to a flu jab in the past.

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