Breakthrough Covid infections 3 times more in immunocompromised Pfizer
New York, Nov 30 Covid-19 infections in the 'fully' vaccinated are rare but are more common and severe in people with weaker immune systems, according to a real-world retrospective study led by the US drug maker Pfizer involving nearly 1.2 million people. The immunocompromised people include those with advanced HIV/AIDS, cancer, kidney disease, rheumatologic or other