2 doses of Pfizer, AstraZeneca shots effective against Delta variant, new study finds<br/><a href="https://www.thedailystar.net/health/disease/coronavirus/fallouts-fightback/vaccine/news/2-doses-pfizer-astrazeneca-shots-effective-against-delta-variant-2135036" rel="noreferrer noopener" target="_blank">thedailystar.net</a>