Fincher said her son's own physician told her the risks of combining the new H1N1 vaccine with his other scheduled vaccines -- for example, tetanus and diphtheria -- are not yet known.

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Over the past seven years the price for the standard five-germ inoculation (including diphtheria, tetanus and whooping cough) has dropped 40%.

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Adults can replace a dose of their regular tetanus-and-diphtheria shot, given every 10 years, with Tdap, but don't have to wait out the 10 years, according to the CDC.

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Under fee-for-service in America, only about three-quarters of children under two are inoculated against diphtheria, tetanus, measles, mumps, rubella and polio.

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Encouraged, they introduced the DTP vaccine, which protects children from diphtheria, tetanus and pertussis (still a top seller), followed by an anti-snake-venom serum for snakebites.

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Babies and children are vaccinated against pertussis, diphtheria and tetanus through a similar vaccine that's referred to as Dtap in a five-dose series during infancy and up to age 6.

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