List of side effects from coronavirus Pfizer vaccine told from people that took the first shot:
-Pain at the injection site (84%)
-Muscle pain (38%)
-Joint pain (24%)
So, the Pfizer vaccine cuts cases of Covid by about 95%, but it does have very common side-effects including pain from the injection, headache, chills and muscle pain. These could affect more than one in 10 people.
These are all symptoms of the immune system kicking into gear and can be managed with paracetamol.
There is always a possibility that vaccines have health consequences that have not yet become clear.
There is data on about 20,000 people who were immunised in the Pfizer trial, 15,000 for the Moderna vaccine and 10,000 for the one developed by Oxford/AstraZeneca.
That is enough data to show the vaccines works and to detect common problems. But they may not pick up something that affects one-in-50,000 people who are immunised.
“You can’t always spot them before you license without a trial of millions of people if the side-effect is vanishingly rare,” says Dr Ward.
But this is true for every vaccine that gets approved. It is not a unique or new issue with the Covid jabs.
The seasonal flu jab has been linked to about a one-in-a-million chance of the nerve disorder Guillain-Barre syndrome, although even more cases are caused by the flu virus itself. And about one in 900,000 people have severe allergic reactions, known as anaphylaxis, to a vaccine.