What happens after taking Pfizer's Covid-19 vaccine?

COVID-19 | Britain became the first country in the world on Tuesday to roll out the Covid-19 vaccine developed by Pfizer and BioNtech, initially making the shot available at 50 hospitals.

The country's National Health Service is giving priority to vaccinating people over the age of 80, frontline healthcare workers and nursing home staff and residents.

Here is what people getting the vaccine should expect...