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Are there different kinds of bacteria? Are most bacteria beneficial or do you only get sick from bacteria?

What are Viruses, and what happens when we get viruses in the body? About, among other things, measles and vaccinations.

Do you know that it can storm in the body and flood? About, among other things, ear inflammation, medication for bronchial catarrh and pneumonia, cough and fever.

What happens inside your body when the wound heals? Do you know that you have seen even under the skin? About, among other things, wound treatment, about sewing and taping up a wound, and about bruises. About different instruments doctors use in hospitals. About x-rays. And how plastering works.

About what you can be allergic to, including dust, different types of food, trees, grass and fur animals. About how allergies manifest themselves and how they are treated.