The average age of volunteers involved in this study was 31 years, in which people are usually not the victim of infection. The corona virus has been mutated thousands of times in such a month of the epidemic, but scientists are worried about three variants which are more contagious than before. These include Britain’s Kent, South Africa and Brazil’s variants. South African variants of these seem to be resistant against the vaccine and have been found in many parts of the world.
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At the same time, Johnson & Johnson and Novavax have also stated that their vaccines are not effective against new strains. Similarly, Moderna is preparing booster shots for the new variant, while Pfizer-BioNTech vaccine has also been found less effective. Britain has purchased 100 million doses of the vaccine of Oxford and millions of people are being vaccinated. On the other hand, 11 cases of variants in non-traveling people pose a threat of community transmission due to which the testing is being speeded up.