If we ignore all ifs & buts, then the exact temperature for melting of snow/ice is 0.01 degree C or 32.02 degree F. While answering this, we should also remember that water has a triple point at this temperature, i.e., it can exist in all the three forms - solid, liquid and gas.
Infectious diseases are caused by microorganisms such as viruses, bacteria, fungi or parasites and can spread between individuals. 1  Infectious diseases are caused by microorganisms such as viruses, bacteria, fungi or parasites. 2  Microorganisms that cause disease are collectively called pathogens.
There are six main types of disease causing agents or pathogens: prions, viruses, bacteria, protozoans, fungi, and macroparasites. These pathogens vary greatly in size and shape, and also in the type of diseases they cause in their host.