isometric micro-organisms disease-causing objects, different types, bacteria, viruses, fungi, protozoa on dirty hand.

amoeba bacteria biological blood body cancer closeup dirty disease diseased dust epidemic flu germs hand health hepatitis human hygiene ill illness infection infectious influenza isolated isometric macro magnifying medical medicine micro microbes microbiology microorganism microorganisms mold organism pandemic parasite parasitology rotavirus science sem small spread therapy various vector virus