|As for hep B, there is evidence that preschoolers can pass it via biting so I would wait on that one and not do it at birth.
Where did you find that information? Everything I've read about Hep B insists that it's an STD, or blood borne. This is via the NIH:The virus that causes hepatitis B is spread through contact with infected blood or other body fluids of people who have hepatitis B. For example, you can get hepatitis B by having unprotected sex with an infected person.
People who use intravenous drugs can get hepatitis B when they share needles with someone who has the virus. Health care workers, such as nurses, lab technicians and doctors, can get these infections if they are accidentally stuck with a needle that was used on an infected patient.
Pregnant women who are infected with hepatitis B can also pass the virus on to their babies.
Hepatitis B cannot be transmitted through casual contact. For example, you cannot get hepatitis B by hugging or shaking hands with someone who is infected.
Furthermore, the immunity from the Hep B vax only lasts 10-20 years. This is a PRO-vaccine article, and even it admits that.http://cw11.empowereddoctor.com/story_435.html
In the book What Your Doctor May Not Tell You...
by Dr. Stephanie Cave, she cites that in 1996, there were fewer than 75 cases of Hep B in children under the age of 5. There were about 20,000 reports of moderate to severe adverse effects in VAERS. I don't like those odds, personally.