Fact check: The CDC's PCR test will be withdrawn after Dec. 31
By Chiara Vercellone
What it means if Covid lateral flow test result shows a faint red line
By Claire Schofield
Why are there Covid test shortages in the UK?
By Laura Hughes, John Burn-Murdoch & Oliver Barnes
Does a faint line on a lateral flow test mean you have Covid? What to do if you get one
By Phoebe Cornish