A lot of people think that JavaScript is a sort of simplified version or spin-off of Java. But in fact the similarity of the names is a coincidence, and the two are unrelated except that both are used to write computer programs that can run inside a web browser.
A vaccine is a medication, usually made from something that is or was alive, that gives immunity to a particular bacterial or viral disease. vaccine is a medication, usually made from something that is or was alive, that gives immunity to a particular bacterial or viral disease.
Vaccines are currently produced by gene techniques, i.e. instead of using a virus or bacterium, certain segments of its chromosomes are isolated and grafted on to others to obtain hybrid elements that do not exist in nature. The result is not a synthetic but a recombinant vaccine  a manipulation of live material.