Vaccine
But we don't yet know when holidays in places including the United States, France and Italy will be easier.
The changes are likely to be small and short-lived, so don't panic.
Matt Hancock announces extension of vaccination programme to 18 to 21 year-olds.
England's lockdown is being extended by four weeks. Here's what the delay to lifting restrictions means.
"Unforgivable moral failure", ex-prime minister Gordon Brown said.
The US State is allowing cannabis retailers to offer a free joint to people getting their Covid jab.
Plus, here's how long you need to wait between your two coronavirus vaccine doses.
The jab is the first to be approved for use in older kids in the UK.
Antibody levels alone do not predict vaccine effectiveness, researchers say.
HuffPost UK reader Ana asked whether she'll need another vaccination in 2022.