Question to the Department of Health and Social Care:

To ask the Secretary of State for Health and Social Care, what guidance he has published on mixing covid-19 vaccine doses in people aged under 40; and if he will make a statement.

Mixing COVID-19 vaccines is not currently advised, unless in exceptional circumstances as there is currently limited evidence of effectiveness and the duration of protection. Guidance on when mixing COVID-19 vaccines may be appropriate has been published in the Green Book, which provides guidance for public health professionals on use of COVID-19 vaccines in the vaccine deployment programme. This advice is also reflected in the guidance on the vaccination programme for healthcare practitioners.