What is covid-19??And is it daugorous

Covid-19 is the coronavirus

Explanation:

It is the flu and pneumonia together people who have died from it are elderly people , people with upper respiratory problems , or people with weak immune systems. The way you can avoid this is by staying home, washing your hands and avoiding contact with your face, and make sure you keep some good distance between you and others (3 to 6 feet)

d, i believe because of it's activity level

exposure to hazardous carcinogens and toxic substances can cause breathing problems, such as copd and various types of cancer. it also increases the risk of heart attacks and strokes and has serious (but no less unattractive) side effects, such as aging, yellow teeth, a terrible smell and damage to the vocal cords.