1. this fuel can easily? 2. when the patient is a carrier of infection spreading among many people long to a few days. 3. the infection is in the air for a long time, or there is resistance to the environment much less?
1. this bacteria can easily do two. Once infected, the sick will be borne spread to the masses for a day three. This bacteria in the air for longer or are resistant to the environment much.
1. This infection can be easily infected patients. How 2 when be borne spread to people หมู่มา very long days 3. This infection in the air for long or are resistant to the environment much .