Tonic water and other tropical posts mixed the powder with soda and sugar, and tonic water was created. The first commercial tonic water was produced in 1858. The mixed drink gin and tonic also originated in British colonial India, when the British mixed their medicinal quinine tonic with gin. Since 2010, at least four tonic syrups have been available in the US. Consumers add carbonated water to the syrup to make tonic water, allowing drinkers to adjust the flavor intensity. Medicinal tonic water originally contained only carbonated water and a large amount of quinine. However, most tonic water today contains less quinine
Malaria vaccine Navy were immunized against Plasmodium falciparum by the bites of 1001 to 2927 mosquitos that had been irradiated with 15,000 rads of gamma rays from a Co-60 or Cs-137 source. This level of radiation being sufficient to attenuate the malaria parasites so that while they could still enter hepatic cells, they could not develop into schizonts or infect red blood cells. Over a span of 42 weeks, 24 of 26 tests on the volunteers showed that they were protected from malaria infection. Malaria vaccine Malaria vaccine is a vaccine that is used to prevent malaria. The only approved vaccine as