种痘可防天花,和注射卡介苗可以防痨是有同样的道理,在我国痨病猖獗的今日,任何人尤其是儿童,随时随地都有被结核菌侵入身体的可能,并且会演变成剧烈的痨病症。卡介苗,是无毒性杆菌,经注射后,能发生免疫的作用,将来身体如感染毒性结核菌的时候,它可以产生抵抗力,不至演成痨症,这种免疫功能,虽未能十足保证,但是也确有相当的价值。 Anti-smallpox can prevent smallpox, and injection of BCG can prevent the same reason, in our country Rickety rampant today, anyone, especially children, have the possibility of tuberculosis bacteria invade the body anytime, anywhere, and will evolve into severe hysteria . Bacillus Calmette-Guerin is non-toxic Bacillus, after injection, the immune effect can occur in the future when the body infected with virulent Mycobacterium tuberculosis, it can produce resistance, not to Hysteria, this immune function, though not fully guaranteed , But it does have considerable value.