what are germs?some  bacteria are good for our bodies _they help keep the digestive system working  properly and keep harmful bacteria from moving in some bacteria are used to produce medicines and vaccines 
bacteria can cause trouble,  too as with  cavities, or sore throat,  antibiotics are used to treat bacterial infections  
viruses:   cannot survive,  grow and multiply.hard washing is the single most  important thing you can do to prevent germs from leading  to infections and sickness 
bacteria:  are tiny bodies  that get nutrients from their environments.the/ term  
refers to the  tiny bacteria and viruses that can cause diseases.