Table 1. The outcome of experimental challenge to the bites of infectious mosquitoes.

Number of infectious bites	1	2	5	4–7	5–8	6–11
Number infected	5	6	215	20	1	3
Number challenged	8	17	216	20	1	3

The number of infectious bites varied over the course of more than 20 years of experiments; it is now commonly performed with five infectious bites. The columns report the number of bites, the total number of people who were infected and the total number of people who were challenged. A detailed description of the data is available in the Supplementary Information.