A pill taken once a week. A shot administered at home once a month. Even a jab given at a clinic every six months. In the next five to 10 years, these options may be available to prevent or treat H.I.V. Instead of drugs that must be taken daily, scientists are closing in on longer-acting […]
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The outbreak of dengue fever that has unfolded in Latin America over the past three months is staggering in its scale — a million cases in Brazil in a matter of weeks, a huge spike in Argentina, a state of emergency declared in Peru, and now another, in Puerto Rico. It forewarns of a changing […]
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