Masks sold at My-Kim are not medical grade N95 masks.  They are intended to help slow the spread of human droplets via sneezes, coughs, and normal breathing.  Masks are not intended to act as a medical device.  My-Kim makes no warranties, expressed or implied, that the mask prevents infection or transmission of viruses or diseases.  If you have any specific questions about a medical matter, consult a doctor or other healthcare provider.