What is a sexually transmitted infection (STI)?
An infection passed from one person to another through sexual contact.
Cambridge IGCSE (9–1) Biology 0970 (Extended) (2026–2028) · 16.6
Revise Cambridge IGCSE (9–1) Biology 0970 (Extended) (2026–2028) specification point 16.6, Sexually transmitted infections, with free active-recall flashcards. Flip through the set or review every question and answer below.
1 / 11
What is a sexually transmitted infection (STI)?
An infection passed from one person to another through sexual contact.
How do condoms reduce the spread of STIs?
They limit contact with infectious body fluids.
When should sexual contact be avoided to reduce STI transmission?
When an infection is known or suspected.
What is the role of testing in controlling STIs?
It identifies infections, including those without obvious symptoms.
How does treating an STI help control its spread?
Treatment helps prevent further transmission.
Why is informing sexual partners about an STI important?
It helps prevent further transmission.
Why does reducing the number of sexual partners reduce STI spread?
It reduces the opportunities for transmission.
Through what can HIV pass from one person to another?
Certain infected body fluids.
When is sexual contact particularly likely to transmit HIV?
When a condom is not used.
How can sharing contaminated needles transmit HIV?
Through blood-to-blood contact.
At what three stages can an infected mother transmit HIV to her child?