Novel coronaviruses can be transmitted by respiratory droplet transmission and contact transmission, as well as by fecal-oral and aerosol transmission in the gastrointestinal tract, the latter two ways to be proven. However, aerosol transmission has some limitations, and is generally only contracted in confined environments and with relatively high concentrations of novel coronaviruses, so health care workers are generally infected to a higher degree. Droplet transmission generally speaking transmission range may have 1-2 meters, if coughing is generally 3-4 meters, sneezing can reach 5-6 meters. So generally the virus can be blocked by a mask. So the new coronavirus has a wide but controllable range of transmission, no matter which way you look at it. As long as you do wear a mask outside, have more ventilation indoors and wash your hands regularly, the transmission route can be effectively blocked. Content source: Dr. You Lai