Penn Study Details Robust T-Cell Response to mRNA COVID-19 Vaccines—a More Durable Source of Protection Results underline the importance of a second dose and include implications for booster shots Messenger-RNA (mRNA) vaccines against the coronavirus that causes COVID-19 provoke a swift and strong response by the immune system’s T cells—the heavy armor of the immune system—according to a study from researchers in the Perelman School of Medicine at the University of Pennsylvan

According to Memorial Hermann's Infectious Disease Specialist Dr. Linda Yancey, the newly vaccinated can still be a carrier for COVID-19. "We know for sure vaccine prevent serious illness and deaths from COVID-19," Yancey told Chron. "We know that a lot of people can get asymptomatic COVID-19. This is especially true with young people. Up to 30 percent of people can have the virus and not know it." In some "breakthrough" cases, Americans who have received COVID-19 vaccines st

By Binayak Dasgupta, Hindustan Times The earliest couple of coronavirus vaccines the world had access to were by Pfizer-BioNTech and Moderna. They have high efficacy rates, and produce some of the strongest immune responses among all Covid-19 vaccines. Common among the two is also their platform – modified mRNA coated in a lipid nano-particle. This technology is the result of research by two scientists, Drew Weissman and Katalin Kariko. In a video interview with Hindustan Tim