COVID-19 vaccines lower the risk of getting sick, seriously ill or dying from the disease. But how do the different types of COVID-19 vaccines work? Each COVID-19 vaccine causes the immune system to ...

A recent study has provided the first side-by-side comparison of how three major COVID-19 vaccine types differ in triggering immune responses and sustaining protection, according to an analysis ...

I n December 2020, mRNA vaccines leapt into the limelight as a response to the COVID-19 pandemic. To date, millions of people ...

You mentioned in a recent column that prospective randomized controlled trials (RCTs) are a powerful type of study. Can you ...

After the rofecoxib (Vioxx) withdrawal in 2004 made painfully clear how much harm a passive reporting system can miss, ...

Covid-19 vaccines roughly halved the chances that a US adult would need to visit the emergency room or be hospitalized with their infections last fall and winter, according to two sources familiar ...