omicron

Healthcare worker who had Covid twice in less than three weeks believed to be quickest reinfection yet.
Some people feel like they're coming down with a bad cold while others feel significantly worse.
Omicron's 'stealth' subvariant is now the dominant strain circulating. Here's what experts know about reinfection.
The BA.2 subvariant is now the dominant strain of Covid globally. Here are the signs to watch for.
What we know about the new 'recombinant' Covid variant so far.
It's too early to tell if the relaxing of Covid rules has led to the rise in cases, but experts advise caution.
If you're vaccinated, here's what to expect from new Covid-19 waves – and what experts still don't know.
UK scientists are looking for 3,000 volunteers to trial the vaccine targeting Omicron.
Here's what experts know right now about the likelihood that everyone will get sick.