Covid-19 has had a bad medical over the world.It has caused for more than 4 million people that caused this disease especially in the America.The main cause is that we are so internal about this disease.This disease can cause through the the breathe so it is a contagious disease.But this disease can be prevented by some ways.Like Vietnam,one of the symbol of curing disease ,has shared that we must wear headmasks when going to the public,or go to the restaurant,...We must isolate all the people that have went from the Covid-19 area..I think that Covid-19 is a dangerous disease but it can be cured