Covid threat to mankind

How it spreads, why call it as communicable disease, methods of prevention, natural purifiers h

Question

Covid threat to mankind  How it spreads, why call it as communicable disease, methods of prevention, natural purifiers how they work in cleaning air​

Amelia · Answer

Answer:   Communicable diseases are illnesses caused by viruses or bacteria that people spread to one another through contact with contaminated surfaces, bodily fluids, blood products, insect bites, or through the air..

Faith

derive the releation between modules of elasticity and modules of rigidity and bulk modules

If sin 0 =
then show
sin a + sin ß
1+ sin a sin B
cos a cos B
1+ sin a sin B
1
that, cos e

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Covid threat to mankindHow it spreads, why call it as communicable disease, methods of prevention, natural purifiers h