Second Pfizer vaccine side effects: 5 potential symptoms you may suffer from

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Vaccine rollout in the UK has emerged as a distinct success, with nearly 35 million people equipped with at least an initial dose. A further 16.2 million have had their second, providing the highest level of immunity from COVID-19. Some people may find their experiences of receiving the jab differ, with some limited symptoms.

Does the second Pfizer jab dose cause side effects?

Each currently available Covid vaccine in the UK, no matter how effective it proves in a trial, requires two doses.

The first dose sets up the immune system to tackle most infections (50 percent or more), and the second pushes this to 90 percent.

Each vaccine is different, however, and people may experience several side effects as their body adjusts.

According to the NHS, potential side-effects of the Covid jab include:

  • A sore arm at the site of injection
  • Fatigue
  • A Headache
  • Aches and pains
  • Feeling or being sick

People may experience these symptoms on the first and second Pfizer dose or with any other vaccine.

The vaccine trains the immune system, and symptoms like this indicate “it’s working” according to Dr Bob Wachter, an academic physician at the University of California, San Francisco.

He told San Francisco-based ABC7 younger people with a “stronger, more exuberant immune system” may end up more likely to have symptoms as the vaccine spurs immune system activity.

Many people won’t experience any symptoms at all, and Dr Wachter said while they should “consider themselves lucky”, this doesn’t stop the vaccine from working as intended.

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Can you have an allergic reaction to the second Pfizer jab?

In most cases, vaccine side effects are completely harmless and will go away in a matter of days.

But rarely, people may also experience potentially dangerous allergic reactions.

The NHS advises people to tell a doctor or nurse whether they have ever had a significant allergic reaction to anything, as the jab may induce anaphylaxis.

People should not have the jab if they experienced an allergic reaction to a previous Covid jab dose or any of its constituent ingredients.

Anaphylaxis symptoms include:

  • Feeling lightheaded or faint
  • Breathing difficulties
  • Wheezing
  • Fast heartbeat
  • Clammy skin
  • Confusion and anxiety
  • Collapsing and loss of consciousness

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