The new experimental TB vaccine dubbed M72 is showing good results while being tested in Africa. But the catch is.... It only works if you already have TB. It's doing about a 52% success rate. If I get TB from one of the fence jumpers here or they develop one that doesn't require you to have TB for it to work put me on that list. I would advise waiting for the 2nd Gen version if possible. Because after TEOTWAWKI I expect TB to make a big come back.
Not just TB I expect a whole lot of nasties that have pretty much been eradicated in the USA to make big come backs.
Once upon a time I was in Spain, ate and traveled around seeing the sites and enjoyed my time there. After I got back I read a notice about Spain's Cattle herds had a TB rate of 90%. Yup went to the Mil Hosp and got tested and retested over the next 2 years. Folks in the US just do not know how much grief they might have missed due to proper medical care which includes, embargoes, vaccines and immigrate vetting. But they will soon find out.