91.   The disease has spread relentlessly since then, advancing to his lungs and most recently to his brain.

92.   The disease is not spreading as quickly among heterosexuals.

93.   The disease spreads in two ways.

94.   The disease is clearly spreading in animals.

95.   The disease spreads in water contaminated with Guinea worm larvae.

96.   The disease is spreading, too, in monasteries around Mandalay, according to a doctor who lives there.

97.   The disease spread to a dozen states last year, from Vermont to North Carolina.

98.   The disease spreads in rural areas in many ways.

99.   The countries where people are most at risk are the poorest and often are those where diseases are spreading fastest, WHO found in a survey.

100.   The finding could partially account for why the disease has spread so rapidly in sub-Saharan Africa, where circumcision rates are low.