Even with a booster, protection against severe disease from Omicron may be around 80 to 85.9%, compared to around 97% for Delta - the other variant that is currently dominant in the UK.

United Launch Alliance has set a new launch date for the final Delta IV Heavy rocket after a technical issue caused a scrub for the first attempt.

Unlike Delta, however, it is not yet considered a ... The UK is already offering booster doses of Covid vaccine to higher risk people ahead of winter, to make sure they have the fullest protection ...

Disease experts have long anticipated that coronavirus vaccines may be less effective for immunocompromised people - but the Delta variant ... people might need booster shots.