Public Health England (PHE) has said it does not recommend mixing COVID-19 vaccines from different suppliers.
The warning comes as distribution of the Oxford/AstraZeneca vaccine is due to start in the UK next week, the second roll-out following the launch of the Pfizer/BioNTech vaccine in December, with both requiring two doses.
On New Year’s Eve, the UK government issued guidance to NHS medics saying that if a person who has received their first jab goes back for their second but the same type is not available, or the first vaccine type is unknown, then it is “reasonable” to offer a dose of another vaccine.