The Medicines and Healthcare products Regulatory Agency (MHRA) on Tuesday authorised a Covid-19 vaccine for infants as young as six months, opening the door
for vaccinating the country's youngest children once the UK's Joint Committee on Vaccination and Immunisation (JCVI) agrees.
The regulator authorised the vaccine - made by Pfizer and BioNTech - for children aged six months to four years old, after it was deemed safe and effective based on
an ongoing clinical trial involving 4,526 participants.
Whether the vaccine is eventually deployed in this age group depends on a recommendation from the JCVI, which advises UK health departments on which shots should be
used as part of the national vaccination programme.
The vaccine is tailored for use in this age group - it is a lower dose version than the one used in children aged five to 11 years. It is given as three injections
in the upper arm, with the first two doses given three weeks apart, followed by a third dose administered at least two months after the second dose.