Covid-19 vaccines are still 'stunningly effective' despite fears that immunity may dwindle over time, experts have said.
and third shots have been available to everyone over the age of 30 in the country since August.
Richard Reithinger, an infectious disease expert and vice president of global health at U.S. based RTI International, told CNBC in an email that most of the developed vaccines for Covid-19 were "nothing short of stunningly effective, even with the newly emerging variants." The data showed the importance of having two doses of these vaccines as the efficacy of both shots against symptomatic infection from the delta variant stood at just 33% three weeks after the first dose, the study found.
"Unfortunately, it's not even [going to be] annually, it will be twice annually," he predicted. "The virus has a huge potential for new variants, many which will work to silence immunity — so there's a chance that we'll need further boosters in the future." However, he said that booster shots may eventually become necessary if data prove the vaccines' efficacy against severe disease and death wanes over time.Schreiber is currently supervising research on a therapeutic drug that would act as a "super-cork," physically jamming itself into cell receptors that the virus attaches itself to.
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