Table 3 Test for STIs available from the internet, walk‐in clinics or for home use.

STI	Target	Specimen	Cost range
Chlamydia trachomatis	DNA antigen	Vaginal swab or urine	US$89.95; £29.95–£45
		Vaginal swab	£2.1–12; US$6–16
Neisseria gonorrhoeae	DNA antigen	Vaginal swab or urine	US$89.95–£45
		Genital swab	US$1–$16
Trichomonas vaginalis	Antigen	Vaginal swab	US$12
Bacterial vaginosis	pH and enzyme markers	Vaginal fluid	US$19.90/2 or US$99.50/12
Herpes simplex type 2	Virus culture antibody	Lesion	US$159.95
		Blood	US$35
Syphilis	Antibody	Blood	US$1–£60

STI, sexually transmitted infection.