Standard surgical masks don’t fully seal around a person’s face, allowing for more participle exposure. But simply adding two rubber bands may improve the seal and offer N95 respirator-level ...

A simple modification to a surgical mask using rubber bands can improve its protective seal against particle exposure to the level of an N95 respirator, a study suggests. Throughout the COVID-19 ...

More than two years into the COVID-19 pandemic, scientists are still scratching their head over a basic question: Is there something they could measure to tell if people are protected? Researchers ...

High levels of exposure to the virus that causes COVID-19 may reduce or overcome the protection that vaccination and prior infection provides, according to a new study by researchers from Yale ...

Flu vaccine appears to be offering reasonable levels of protection this winter, with particularly strong levels in children, new data from the Centers for Disease Control and Prevention suggest. The ...

Experts say that the level of carbon dioxide in indoor air is an easy proxy for potential COVID-19 exposure. Outdoor air typically has less than 400 ppm of carbon dioxide. My measurements showed CO2 ...