Your News Feed is about to get a lot more expressive. After months of user testing in a handful of countries, Facebook today is releasing "Reactions" to the rest of the world. The feature isn’t so ...

The continual growth of bioorthogonal chemical reactions in the past decade has offered an unprecedented opportunity for the study and manipulation of biological processes within living systems 1,2,3.

The Centers for Disease Control and Prevention reported Wednesday that at least 21 people have had a severe allergic reaction after receiving their first dose of the Covid-19 vaccine. All of the ...

Allergy affects more than one billion people worldwide—and the number is rising. For many, it means mild symptoms such as itching and a runny nose. For others, it can develop into life-threatening ...

Baden et al. 1 report on a phase 3 clinical trial of the mRNA-1273 vaccine against SARS-CoV-2, and they provide information on immediate injection-site reactions, which were observed in 84.2% of the ...

The earliest description of an incompatible hemolytic transfusion reaction dates to the experimental start of transfusion therapy in the mid-17th century. While treating a nobleman who had episodes of ...