Your body produces antibodies after an infection or vaccine, but these slowly decline over time. New Johnson & Johnson data sheds light on the duration of protection and
‘Breakthrough’ infections can happen because of waning immunity or high viral doses. But our vaccines are still excellent at preventing severe disease and death
Covid-19 vaccination produces a more consistent immune response than a past infection. With the delta variant, the difference in protection may be even greater
You’ve been vaccinated; can you now safely see your friends and family? New research hints that vaccinated people may be less likely to transmit the coronavirus, but
Reports describe a Hong Kong man who was reinfected with the coronavirus after returning from Europe. Does that mean he wasn’t immune after the first infection?