Prior Omicron infection seems to offer little protection even for those who have been triple vaccinated, a study has found. PA.
Prior Omicron infection seems to offer little protection even for those who have been triple vaccinated, a study has found. PA.
Catching Omicron ‘does not protect against future infection’ amid rise of BA.4 and BA.5
Experts say virus could further mutate into a more 'pathogenic strain'
