Entry regulations for american citizens

Passport and visa required.
Tourist visas require 1 application form, 2 photos, onward/return ticket, $150 fee, and proof of sufficient funds.
Visa must be obtained before arrival. Include prepaid envelope for return of passport by certified mail.
AIDS test required for all students and anyone over 18 staying 1 year or more; U.S. test from well known lab accepted.
For information about business visas and other requirements, consult the Embassy of India, 2536 Mass. Ave., N.W., Washington, D.C. 20008 (202/939-9806/9839) or nearest Consulate General: Chicago (312/595-0405), Houston (713-626-2355), New York (212/774-0600) or San Francisco (415/668-0683).
Internet: http://www.indiagov.org
 

Vaccination

No vaccinating regulations on a direct entry from the US