a) Figure 2 shows the number of people diagnosed with sexually transmitted
infections (STIs) in the UK during 2017.
sexually transmitted infection
(STI)
number of people diagnosed
per 1000 of the population
chlamydia
3.7
gonorrhoea
0.8
genital herpes
0.6
genital warts
syphilis
1.1
0.1
Figure 2
(i) State the sexually transmitted infection that has the median number of
people diagnosed.
​