Article: When the Water's Bad, Seniors Must Take Care; Immune System Hard Put to Deal With Bacteria

The recurring problems with Washington's aging public water system can pose some special challenges for the elderly, the reason experts recommend that seniors pay close attention to public health warnings.

Seniors are generally more vulnerable to infections than younger adults, said William H. Adler, chief of clinical immunology at the National Institute on Aging in Baltimore. A less vigilant immune system, normal physical changes that accompany aging and the frequent presence of other medical problems can compound the ill effects of water-borne infections.

Earlier this month, D.C. public health officials advised everyone 65 and older and people with weakened immune systems to boil ...

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