Embraces should be selective, short, and avoid face-to-face contact, says Sage member Prof Cath Noakes.
Some complementary medicines result in marginal weight loss but do not benefit health, study suggests.
Link to rare blood clots leads to shift in vaccination programme for younger age groups.
Other groups have reported higher protection, but the results are still seen as a triumph.
A question everyone's asking: what's my Covid risk? Here's how to find out.
Borrowing - which hit a record £22.3bn in October - cannot go on indefinitely, chancellor says.