Obeying the rules at home to avoid the spread of the coronavirus

I have read much about biological weapons and diseases. Years back, if a prophet, a soothsayer, or anyone with a third eye would have told me

There wasn’t any tuberculosis in Africa, so how did it appear there?

In cases of pulmonary tuberculosis, it is possible to isolate these bacteria in the sputum in 86% of patients. Every third person in the world is