A new report examines the safety of bivalent COVID boosters among 1.7 million over-50s

In a recent study posted to medRxiv*, researchers in Denmark examined the risk of adverse events after severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) Omicron-based bivalent booster vaccination. Bivalent messenger ribonucleic acid (mRNA) boosters targeting the ancestral SARS-CoV-2 and the Omicron BA.1 or BA.4/5 spikes were approved for use in 2022. These bivalent boosters were … Read more

The benefit-risk of the mRNA-1273 COVID-19 vaccine

In a recent study posted to the medRxiv* preprint server, researchers modeled the benefit-risk of Moderna’s coronavirus disease 2019 (COVID-19) mRNA-1273 vaccine. Studies: BENEFIT-RISK ASSESSMENT OF COVID-19 VACCINE, MRNA (MRNA-1273) FOR MALES AGE 18-64 YEARS. Image Credit: Mrz producer/Shutterstock Background The mRNA-1273 vaccine was approved for emergency use in the United States (US) and received … Read more

Mortality Higher in Myocarditis After Virus Than After COVID Vax

Editor’s note: Find the latest COVID-19 news and guidance in Medscape’s Coronavirus Resource Center. Myocarditis cases following administration of the Pfizer-BioNTech mRNA COVID-19 vaccine have a significantly lower rate of mortality compared with myocarditis associated with viral infection, a new registry study suggests. Investigators examined data from Hong Kong Territory national health registry to compare … Read more