Omicron scare: UK reimposes pre-departure RT-PCR tests, adds Nigeria in travel ban red list

The UK government said on Saturday (December 4) that a new analysis conducted by the UK Health and Security Agency (UKHSA) indicates that the window between infection and infectiousness may be shorter for the Omicron variant, which increases the efficacy of pre-departure testing as it is more likely to identify positive cases before travel.