వ్యాక్సిన్లతో రోగాలు రాకుండా అరికట్టే ప్రక్రియ ఎలా మొదలైంది?
YES ! IF ANYTHING MICROBE LIKE THAT WHICH CAUSES SAME ILLNESS IS INJECTED BACK INTO PATIENT,THEN HEALTHY PERSON DEVELOPS IMMUNITY AGAINST THAT ILLNESS.
Word/s come alive.Make it so.
Manual scavenging of human excreta is "inhuman" profession(work) which still needs to be eradicated. Most percent young and adult Indian voters don't know that above point is in "Indian national congress election manifesto"
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