enfermedad infecciosa 25
Infectious diseases kill more people worldwide than other single cause. Infectious diseases are caused by germs. Germs are tiny living beings that are everywhere: in the air, on land and in water. An infection can be purchased by touching, eating, drinking or breathing something containing germs. Germs can also be spread by bites of animals or insects, kissing and sexual contact. The vaccines, properly wash hands and medications, help prevent infections.There are four main types of germs: bacteria: germs of a cell that multiply quickly and can release chemical substances that the sick Virus: capsules that contain genetic material and use their own cells to grow mushrooms: wild plants, such as mushrooms or rust protozoa: single-celled animals that take advantage of other creatures for food and a place to live