covid 19 - preventive use of masks for the Chinese virus that caused the pandemic in 2020
Palabras clave
pandemic,
mask,
prevention,
patient,
widener,
human,
disease,
disease,
safety,
surgical,
isolated,
protect,
equipment,
health care,
doctor,
sick,
protective,
pollution,
disease,
flu,
face,
protection,
job,
care,
contamination,
infected,
antibiotic,
global,
virology,
danger,
corona,
fever,
medicine,
china,
health,
vaccine,
infection,
flu,
medicals,
virus,
epidemic