Pfizer, Oxford COVID-19 vaccines reduces severity of the disease in elderly: pre-print study

Symptomatic COVID-19 infections in those 70+ years of age also decreased, three weeks after a single shot of either vaccine was given.

from http://www.firstpost.com/health/pfizer-oxford-covid-19-vaccines-reduces-severity-of-the-disease-in-elderly-pre-print-study-9369331.html