What pollution comes from many small sources

The germs that cause infections are mainly spread in what three ways? a. immunization, mucous membranes, not washing hands b. germ-laden droplets, direct contact with body fluids, insects c. hand hygiene, sickness, immunization d. not enough sleep, low oral hygiene, germs

What type of medicine to people take if they are lactose intolerance

Which of these pieces of safety equipment should be worn when operating a chainsaw