Vaccination might only offer limited protection against the Delta variant of Covid, new research by Public Health England has suggested.
Levels of coronavirus in those who had had both jabs were little different from people yet to be vaccinated stated the report, though PHE insisted the results were very early stage.
“Levels of virus in those who become infected with Delta having already been vaccinated may be similar to levels found in unvaccinated people,” it said.
“This may have implications for people’s infectiousness, whether they have been vaccinated or not,” it added.
PHE said it needs to undertake more analysis to confirm the findings, but if accurate it would be a significant blow to hopes of establishing herd immunity to stop the spread of Covid said, scientists.
The update from the PHE also highlighted another strain of Covid, B.1.621, that had been detected in 37 cases of the virus by 4 August.
“There is preliminary laboratory evidence to suggest that vaccination and previous infection may be less effective at preventing infection this variant ” said PHE, though again it added the data available at this stage was very limited.
The news came as holiday firms reported a surge in bookings after the latest update to the travel light system announced yesterday.
Jet2 PLC (AIM:JET2) reported requests for holidays in August to countries now classified as green or amber jumped by 250%, while Hays Travel reported a 193% rise yesterday with France one of the top destinations now that the requirement to self-isolate on return has been lifted.
Shares in Jet2 were little changed today at 1,320p.