An individual infected with Omicron can spread the infection within hours, according to an expert.
On the other hand, infections spread with previous strains in...
A third dose of AstraZeneca's Covid vaccine, named Covishield in India, produces similar neutralising antibody levels against Omicron as after two doses against the...
While it is known that Covid infections give natural antibodies, a new study has shown that people who are unvaccinated but were previously infected...