This is likely to mean immunity levels decline and raises the risk of reinfection, researchers say.
Intensive care units are now beginning to fill, the World Health Organization tells the BBC.
Labour's review says ethnic minorities are "over-exposed" and have worse healthcare than white people.
Influencer Molly-Mae Hague, 21, is raising awareness about skin cancer among young people.
Plastic surgeons implore people to think twice about DIY back garden displays, to avoid injuries.
Her birth has also led to a debate about the ethics of using technology to create a child.
The £120 nasal swab test will be available to people not showing any symptoms.
Doctors say Covid-19 is now rampant in the refugee camps of Idlib, north-west Syria.
Some parts of the surrounding county will also face the toughest Covid rules.
Units for new mothers and women with serious mental health issues are facing unique challenges.