Teenagers would get the Covid jabs before younger children if they were rolled out to under-18s, according to a JCVI member.
Professor Adam Finn, from the University of Bristol and a member of the Joint Committee on Vaccination and Immunisation (JCVI) said more than one study was needed before decisions were made about extending the vaccination programme to children.
The Telegraph revealed on Tuesday night that children are in line for Covid jabs from August. Prof Finn admitted that it was something they “certainly” might need to do, but insisted that more tests were needed.
He told ITV’s Good Morning Britain: “If it does turn out to be necessary to immunise children, I think it is more likely that we would prioritise teenagers over younger children, simply because the evidence we have at the moment is that transmission of the virus is more likely to occur from and between teenagers who are a little bit more like adults.
“I think what we need to learn before that, what proportion of the population we need to immunise in order to get effective herd immunity and to suppress circulation of the virus .
“In order to do that we need to have a clear understanding of how efficiently the vaccines actually interrupt infection and transmission and that evidence is still on its way at the moment.”
No final decisions have been made on vaccinating children against Covid-19, Prof Finn said.
While children are unlikely to fall ill with Covid-19, they do play a role in transmitting the virus.
The University of Oxford is currently carrying out a clinical trial on children to test the safety and efficacy of its vaccine in younger age groups, with initial results expected in the summer.
The trial is working with partner sites in London, Southampton and Bristol and includes around 300 youngsters aged six to 17.
Responding to reports that children could be vaccinated from August, Prof Finn told Good Morning Britain: “As far as I know there has been no decision made to immunise children starting in August, or indeed any decision been taken to immunise children at all at this point.
“But it’s certainly something that we might need to do.”
Referring to the aim to have the adult population vaccinated before the end of July, Prof Finn said: “During that time we will see what goes on with variants, with the circulation of the virus, and then we’ll be able to make a decision whether children need to be immunised – we clearly won’t want to do that unless it’s necessary.
“But if it is necessary we will by then know whether the vaccines are entirely safe and effective and we’re giving the right dose and so on, so that we go forward with that later in the year.”
Prof Finn said more studies are forthcoming on how vaccines work in children, adding that “in order to establish that vaccines can safely be used in children, we need to do that”.
Currently, only children at very high risk of severe infection are offered a jab.
A spokesman for the Department of Health said: “While clinical trials are under way to test the efficacy and safety of Covid-19 vaccines in children and young adults, these trials have not concluded yet.
“We will be guided by the advice of our experts on these issues including the independent JCVI.”
It came as Home Secretary Priti Patel praised pharmaceutical firms after Boris Johnson privately told Tory MPs the UK’s vaccine programme has been successful because of “capitalism” and “greed”.
She told Sky News: “The Prime Minister always acknowledges the strong success we’ve had in terms of the vaccine, not just the rollout, which is incredible, but also our ability as a country to develop the vaccine, the role that pharmaceutical companies and science and technology has played in that.
“And, actually, I think that speaks to a great strength we have as a country.
“And linked to that, of course, look at our contributions to Covax, the international scheme, to get the vaccine supplies elsewhere and demonstrate that we are a very, very strong force for good internationally when it comes to vaccines, science and pharmaceutical development.”
The Prime Minister is set to be grilled by senior MPs over his handling of the pandemic later when he appears in front of the Liaison Committee, made up of Commons select committee chairs.
It will take place after Mr Johnson’s weekly session with Labour leader Sir Keir Starmer at Prime Minister’s Questions in the House of Commons.
Shadow health secretary Jonathan Ashworth has said there has been a “litany of errors” from the Prime Minister during the crisis and that “lessons must be learnt”.