<prompt> Translate the following text to EnglishUtaratibu wa kiwango cha maambukizi ni sawa na bidhaa ya hatari ya idadi ya watu mara ukubwa wa idadi ya watu ambao ni sawa na moja, na inakadiriwa kuwa 6 milioni katika dola za 1999.  <response>: The statistical incidence of a single death, equivalent to a product of a population risk times a population size that equals one is estimated to be 6 million in 1999 dollars. 