WORLD HISTORY

Detailed explanation-1: -Active immunity: The production of antibodies against a specific disease by the immune system. Active immunity can be acquired in two ways, either by contracting the disease or through vaccination.

Detailed explanation-2: -Dr Edward Jenner created the world’s first successful vaccine. He found out that people infected with cowpox were immune to smallpox. In May 1796, English physician Edward Jenner expands on this discovery and inoculates 8-year-old James Phipps with matter collected from a cowpox sore on the hand of a milkmaid.

Detailed explanation-3: -Early in the 18th century, variolation (referred to then as ‘inoculation’) was introduced to Britain and New England to protect people likely to be at risk of infection with smallpox. This triggered a number of important developments.

Detailed explanation-4: -When you get a vaccine, it sparks your immune response, helping your body fight off and remember the germ so it can attack it if the germ ever invades again. And since vaccines are made of very small amounts of weak or dead germs, they won’t make you sick.