“A booster dose is crucial for the best outcome from a coronavirus infection. No one who has had a third dose has had severe Covid or has died,” Prof. Penka Petrova, director of the Bulgarian Academy of Sciences Institute of Microbiology said for the BNR.

“The reason why people are still getting infected in countries where vaccination rates are high is that there are many people there still who are unvaccinated. In Germany and the UK 30% are unvaccinated, and infection among them is highest,” Prof. Petrova said.

“I expect this to be the last wave of coronavirus to sweep over Europe, and in March 2022 when we are going to have an updated mRNA vaccine, I expect us all to have encountered the virus in one form or another, or to be vaccinated, so that we shall have full immunity and societies can go back to their normal way of life,” Prof. Penka Petrova explains.