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 [...]
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 [...]
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 [...]
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 [...]
