@theconversation.com 3 years ago New Johnson & Johnson data shows second shot boosts antibodies and protection against COVID-19 – but one dose is still strong against delta variant
@theguardian.com 3 years ago Breakthrough infections and booster shots: what you need to know
@snopes.com 4 years ago US to Share AstraZeneca Shots with World After Safety Check
@rt.com 4 years ago US ‘will not need’ AstraZeneca Covid jab for vaccine rollout, Fauci says, as pharma giant suffers another setback