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La ola de Omicron no ha terminado. Y la variante más reciente puede ser la cepa más contagiosa del virus SARS-CoV-2 hasta ahora. La subvariante BA.5 es ahora la cepa...

The Omicron wave of the ongoing COVID-19 pandemic is not over. And the Ba.5 variant may be the most contagious strain of the SARS-CoV-2 virus yet.

Masking is one of the best ways we can protect ourselves and others against respiratory viruses, including COVID-19 . But research has discovered that not all masks are created equal.