Covid antibodies in almost 90% of over-80s after two doses of Pfizer vaccine | ITV News<br/><a href="https://www.itv.com/news/2021-02-24/two-doses-of-pfizerbiontech-vaccine-produce-a-high-number-of-antibodies--study" rel="noreferrer noopener" target="_blank">itv.com</a>