virus

/Tag: virus

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 [...]