immunity
HuffPost UK reader Lisa asked why people who have had Covid-19 are being told to get vaccinated.
The same study found past Covid-19 infection provides some immunity for at least five months.
The patient, living in Nevada, was infected with two variants of the virus – and ended up in hospital the second time.
With the prime minister self-isolating, here's what we know about the potential for reinfection.
Immunity in the UK is “waning quite rapidly”, a new study suggests. Here's what that means.
What is herd immunity? And can you get Covid-19 twice?
Little ones flying the nest for the first time; big ones heading off to secondary school with barely more than a glance back at the gates; the new school year is well underway, which means coughs and colds will no doubt be rearing their ugly heads soon too.
No more sick days.
Winter flu season could be a thing of the past, as scientists have developed a new universal flu vaccine. The groundbreaking
The United Nations has been given an ultimatum - pay compensation to individuals affected by the cholera outbreak in Haiti