PeaceHealth physician Dr. Shawn Aaron, right, demonstrates a COVID-19 vaccine diagram that he draws for his patients Friday to Dr. Carly Chambers at St. John Medical Center. When having conversations ...

PERHAPS THE best litmus test of the post-pandemic world will be how much international travel returns. In 2020 international tourism arrivals fell by 74% compared with 2019, to just 380m—by contrast ...

Vaccine shedding is when someone sheds weakened pathogens, usually in their poop, from a recent, live-attenuated vaccine. Shedding rarely spreads or causes illness in other people. Vaccines are vital ...

mRNA vaccines tell the body how to make a protein that produces immunity against specific microbes. In contrast, traditional vaccines use weakened or dead microbes, or pieces of them, to stimulate ...

Viral variants of concern may emerge with dangerous resistance to the immunity generated by the current vaccines to prevent coronavirus disease 2019 (Covid-19). Moreover, if some variants of concern ...