the meaning of 'in situation(s)'

[Sweetpumpkin]

Hi,

While listening VOA, I found an interesting phrase: in situations.

"If you are careful in your sexual contacts, you wear a condom. If you are an injection drug user, you use clean needles. If you engage in sex with someone and you don't know what their sexual history is, you use a condom. In situations, that in certain countries for example, abstinence or delaying sexual debut works (and) in some circumstances, not all -- being faithful to your partner, knowing the HIV history of your partner. Circumcision has proven to be quite effective to the tune of about 55 to 65 percent in men in situations who are heterosexually having sex with women. We're not sure about whether or not it protects among gay men," he said.

First 'in situations' means, I think, 'in some circumstances' or something like that. But the second one- I have no clue- what does that mean?

Thanks,
sweetpumpkin

[Mister Micawber]

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They are mis-transcribed or mis-heard or something. They don't fit grammatically or semantically.
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Native English teacher at Mister Micawber's