Coronavirus (COVID-19) spreads mainly from person to person through respiratory droplets when an infected person coughs, sneezes, or talks. Wearing a cloth face covering correctly can help prevent the spread of COVID-19 to others, including people with cancer or a history of cancer. When you go out on essential trips, wear a cloth face covering that fits snugly and reaches above your nose, below your chin, and completely covers your mouth and nostrils.
Resuelven el enigma de los silicatos cristalinos en cometas
Hace 47 minutos


No hay comentarios:
Publicar un comentario