@jinksy300363 @iJezabella (3/4) Currently, over three-quarters of deaths caused by SARS-CoV-2 infection are in this older population, so it is essential that any vaccine is able to protect this group. The reason for this is because age is by far the strongest risk factor associated with severe COVID-19

from http://twitter.com/NHSuk/status/1342751571730432001