Imperial College study finds R value higher for older people, raising concerns about waning immunity
Covid cases appear to be rising in older people as increased socialising, waning immunity and a more transmissible version of the Omicron variant threaten to fuel a resurgence of the virus.
Tests on nearly 100,000 swabs from homes across England reveal that, while infections have fallen overall since the January peak, one in 35 people tested positive between 8 February and 1 March, with cases either level or rising in those aged 55 and over.
