Infectious diseases kill more people worldwide than any other single cause. Infectious diseases are caused by microorganisms. Microorganisms are tiny living things that are found everywhere - in air, soil and water.
Etc. can aids be spread through contact with a person's blood, which have aids. This most commonly occurs through blood transfusions in areas of the world, where there is little to no screening of blood donors or blood donations. However, it can also be transpire when infected blood is visible to an opening on the skin such as a cut or other wound.You can also get the diseases by eating, touching, drinking or breathing something that contains a microorganism. Microorganisms can also spread through animal and insect bites, sexual contact and kissing. Vaccines, proper hand washing and medicines can help prevent infections.
There are four main kinds of microorganisms:
Bacteria - one-celled microorganism that quickly multiply and may release chemicals, which can make you so sick that you can die.
Viruses - capsules that contain genetic material, and use your own cells to multiply.
Fungi - primitive vegetables, like mushrooms or mildew.
Protozoa - one-celled animals their live on other things like food or something like that.
Those microorganisms can kill large populations. The most dangerous ability is that they spread very fast, and kill people “on their ways”. It is difficult for us to invent cures, because the microorganisms get resistance over for the cures. We are trying to follow the microorganisms, but it is difficult, and people all over the world are dying, while courier becomes invented.
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