2022年2月18日 · Viruses. Even smaller than bacteria, viruses cause a multitude of diseases ranging from the common cold to AIDS. Fungi. Many skin diseases, such as ringworm and athlete's foot, are caused by fungi. Other types of fungi can infect your lungs or nervous system. Parasites. Malaria is caused by a tiny parasite that is transmitted by a mosquito bite.

2024年3月5日 · There are many types of fungi. People eat some of them. Mushrooms are fungi. So are the molds that form the blue or green veins in some types of cheese. And yeast is a type of fungus needed to make most breads. Other fungi can cause illness. One example is the yeast candida. Candida can cause an infection of the mouth and throat called thrush.

2023年2月4日 · Viruses. Viruses are bits of genetic information, either RNA or DNA, surrounded by protein. A virus needs a living host, such as a person, plant or animal. To spread, a virus gets into a host's body and then into the host's cells. Then it takes over the host cell's machinery, using it to make more of the virus. Diseases caused by viruses include:

2025年1月30日 · COVID-19 vaccines lower your risk of getting sick, seriously ill or dying from the disease. But how do the different types of COVID-19 vaccines work? Each COVID-19 vaccine causes the immune system to create proteins called antibodies. These proteins fight infection with the COVID-19 virus.

Explore comprehensive guides on hundreds of common and rare diseases and conditions from the experts at Mayo Clinic.

2025年1月28日 · Flu, also called influenza, is an infection of the nose, throat and lungs, which are part of the respiratory system. The flu is caused by a virus. Influenza viruses are different from the "stomach flu" viruses that cause diarrhea and vomiting. Most people with the flu …

2023年11月4日 · Can face masks help slow the spread of the virus that causes coronavirus disease 2019 (COVID-19)? Yes. When used with measures such as getting vaccinated, hand-washing and physical distancing, wearing a face mask slows how quickly the virus that causes COVID-19 spreads.

2024年7月17日 · Dengue fever is caused by any one of four types of dengue viruses. You can't get dengue fever from being around an infected person. Instead, dengue fever is spread through mosquito bites. The two types of mosquitoes that most often spread the dengue viruses are common both in and around human lodgings.

2022年2月18日 · Certain types of bacteria are especially susceptible to particular classes of antibiotics. Treatment can be targeted more precisely if your doctor knows what type of bacteria you're infected with. Antibiotics are usually reserved for bacterial infections, because these types of drugs have no effect on illnesses caused by viruses.

Learn about the history of major disease outbreaks, epidemics and pandemics, as well as the impact vaccines and research had on many infectious diseases ...