Government advisers are meeting Thursday to decide if COVID-19 vaccines need updating to improve protection this fall and winter — even as a new Trump administration policy has thrown into question ...

According to doctors, immunity from previous vaccines wears off over time, activating exposure to Omicron immune responses. However, mRNA vaccines give adequate protection and adaptability, so it is ...

India’s resilience against Covid-19 depends on several factors - widespread prior exposure to the virus, extensive ...