Aonflux,
I just completed my medicals at Apollo Hospital in Delhi a few days back. For adults they have to undergo blood tests and chest x-ray (they do not give it to females who are pregnent). The doctor's clerical assistant asked us about our medical history and the vaccinations that we had take. History - were you hospitalized, do you smoke, did you have chicken pox, measles, malaria, mums, TB, Typhoid, Jaundice, etc - if yes, when. He then asks if you are carring your immunization records. If you are not then they would ask you to take TD and MMR shots. (I did not have any immunization records). He then completes the forms 3001, 3053 etc, the doctor then sees you - does BP check, Vision Check, Checks for Glands on the body, checks your reflexes etc. (No undressing). He then verifies what the clerk has written about your medical history. He may change the recommendation of vaccines. (he did so in my case reduced one). Got the reports after two days.
Hope this helps..
I am not a lawyer and this is not a legal opinion.