Small changes to periods can follow a Covid vaccine but they quickly return to normal, a leading UK menstruation expert has said.
Two-thirds of people recently infected with the Omicron variant say they had already had Covid previously.
Pfizer and BioNTech have started clinical trials of a new Covid vaccine which targets the Omicron variant.
Who hasn't let out an exasperated "Is the pandemic finished yet?" or a "When can I just get on with my life?" over the past two years? I know I have.
Experts are trying to assess the impact of volcanic ash and toxic sulphuric gases in the air after a volcano erupted in Tonga on Saturday.
More than 1.2 million people died worldwide in 2019 from infections caused by bacteria resistant to antibiotics, according to the largest study of the issue to date.
A fourth Covid jab is not yet needed, say UK experts, because booster doses continue to provide high protection against severe disease from the Omicron variant among older adults.
The World Health Organization (WHO) has warned against describing the Omicron variant as mild, saying it is killing people across the world.
India is bracing for a third wave of coronavirus as its largest cities - the capital Delhi and financial hub Mumbai - see a surge in cases.
China has put a second city into total lockdown after just three asymptomatic Covid cases were discovered.
