As the world grapples with deadly Delta variant of Covid-19, there is more grim news. A study in UK has found that the Covid-19 vaccines are less effective against the delta variant, Blooomberg has reported.
According to the survey by the University of Oxford and the Office for National Statistics, Pfizer's vaccine lost effectiveness in the first 90 days after full vaccination, though both Pfizer and AstraZeneca shots still staved off a majority of Covid infections.
When vaccinated people did get infected with delta, they had similar levels of virus in their bodies as those who hadn’t had their shots.
The results may fuel a push for booster shots for fully vaccinated people.
The US has already said that fully vaccinated people will be given a third shot after eight months. UK is yet to take a call on a booster shot.
The UK study analysed more than 3 million PCR tests from a random sample of people for a detailed picture of infection patterns as delta became the dominant variant this year.