Maskmania- a surgical mask can catch sneeze droplets >300nm in size. Covid-19 is 100nm diameter Masks are intended to stop the WEARER from spreading virus to others They are not an effective airborne virus catcher n95 masks have a better seal but are not suited for wearing all day. A doctor in China stated he caught Covid-19 through his eyes and a report was issued already on occular transmission of the virus. HKU is investigating the fecal oral transmissibility of the virus especially in squat toilets with viral plumes - using the extractor in the loo whilst making a deposit causes a low pressure area and a viral plume- the major contact methods of this virus are -eating from the same trough where infected persons partake (see the 9 family members hotpot case) - fomite contact ,lift buttons. door handles, MTR escalator rails, MTR handrails, infected surfaces, mobile phones are major harbingers of virus that people put next to their faces THEN touching your face. A NSW report shows on average people involuntarily touch or scratch their face 23 times per hour hence ingress via eyes, nose and mouth. Touching a mask exterior that has droplets on it then touching your face is another transmission method - hence frequent handwashing is the best solution To put the virus size in perspective, the dangerous PM2.5 (2.5 microns um) enter our nose and lungs unhindered- 2.5 microns equates to 2,500 nm Nanometers- the Covid-19 is 100nm diameter If you have to sneeze then do it inside your crooked elbow