After seeing my post The men of ward 57, a friend who was a "Donut Dolly" visiting soldiers in the hospital during the Viet Nam War, and says it's time to do it again, sent me the information for people interested in volunteering here in NYC:

To register to volunteer at the Veterans hospital

423 East 23rd Street (just east of First Avenue)
Room One South (ask Security)
Frank Civitillo or his assistant
212-686-7500 x 7920
walk in Mon-Fri 8:00 am to 4:00 pm

They will interview you and arrange for a T.B. shot. There are plenty of volunteers now, during this height of feeling, but many surviving Veterans probably need whatever you offer.