How long did vaccines take to reach India

When were vaccines for diseases available in the world and when did India get the same: 

                       World       🇮🇳 
Rotavirus      1998       2015
Encephalitis 1930      2013
Hepatitis B   1982       2002
Polio              1955      1978
Tetanus         1924      1978
#Covid19      Dec 20   Jan 21
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