Pfizer and AstraZeneca COVID-19 vaccines 'highly effective' in elderly: UK study<br/><a href="https://news.abs-cbn.com/spotlight/03/02/21/pfizer-and-aztrazeneca-covid-19-vaccines-highly-effective-in-elderly-uk-study" rel="noreferrer noopener" target="_blank">abs-cbn.com</a>