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What is yellow fever? – History of medicine

By |2019-03-28T12:19:12-07:00September 7th, 2017|Africa, Science|

Kids with yellow fever in Mississippi about 1870. See how all the people are white? The hospital wasn't letting black kids in, or hiring black women as nurses. Where did yellow fever get started? The virus that causes yellow fever probably evolved from an earlier virus that didn't make people sick. The first cases of [...]

What is typhus? History of diseases

By |2017-09-07T10:30:32-07:00September 7th, 2017|Science|

A woman with typhus Nobody seems to have caught typhus before about 1450 AD, so the disease probably didn't exist until then. Typhus is an infection caused by tiny germs (bacteria) that live inside animal cells, and most people caught the germs from lice, when the lice bit them (the lice die of typhus too). [...]

What is typhoid fever? History of diseases

By |2018-09-11T05:38:29-07:00September 7th, 2017|Science|

Typhoid fever: A person with typhoid rash (Iran) Is it typhoid or typhus? Typhoid fever isn't the same thing as typhus at all. You catch typhus from being bit by lice that have bitten people with typhoid, and you catch typhoid from drinking water with traces of human poop in it. (You can't catch typhoid from animals.) Find [...]

What was smallpox? History of disease

By |2018-04-15T17:01:43-07:00September 7th, 2017|Central Asia, Science|

A baby with smallpox (from the CDC) Smallpox was a very serious disease caused by a virus. Many people died of it. Smallpox caused little bumps on your skin, like chickenpox but much more serious. About two to five of every ten people who got smallpox died of it. There was (and is still) [...]

What is measles? History of diseases and medicine

By |2018-04-25T17:11:36-07:00September 7th, 2017|History, Science|

A kid with measles Measles is a sickness that first makes you feel sick, with a fever, a cough, and a runny nose. Then it gives you a rash all over your skin. It is caused by a virus, and you usually catch it by touching a person with measles, or touching something they [...]

Ancient diseases and doctors – History of medicine

By |2019-05-13T10:53:35-07:00September 6th, 2017|Egypt, Science|

Greek doctor letting blood out of a patient because he believes in the four humors: history of medicine How did ancient doctors treat diseases? Ancient doctors tried to cure everyone who was sick, but they did better with some diseases than with others. The history of medicine is full of mistakes as well as [...]

What is dengue fever? History of disease and medicine

By |2018-04-25T10:34:33-07:00September 6th, 2017|Science|

Dengue history: the dengue virus - magnified many times Dengue history Probably dengue fever didn't exist before the late 1700s AD, so in the ancient and medieval worlds there was no dengue fever. Most people think that the virus that causes dengue evolved from some earlier virus that didn't make people sick. Dengue appeared all over [...]

What are vaccinations? Definition of vaccination

By |2017-05-30T11:08:03-07:00May 30th, 2017|Biology|

Children being vaccinated  A vaccination is a way to keep animals (both people and other kinds of animals) from getting sick when viruses get inside their bodies. The earliest kind of vaccination was when people noticed that if you had already had the sickness and gotten better, you couldn't catch it a second [...]

What is a virus? Evolution and biology

By |2017-05-30T10:58:32-07:00May 30th, 2017|Biology|

The virus that causes AIDS (greatly magnified) HIV image copyright Russell Knightley Nobody is quite sure whether viruses are living things or not. The first living things may have come from viruses. But it's also possible that viruses evolved from living cells and got gradually less complex and more dependent on their hosts to live. [...]

Vaccination stories – Virus project

By |2018-04-15T17:01:41-07:00May 30th, 2017|Biology|

Talk to your grandparents about vaccinations Until the 1950s, most people never got any vaccinations at all. To see how much kids' lives have changed because of vaccination, find somebody who was a kid in the 1940s or 1950s (They would be about 65 or 75 years old now - your grandparents might [...]