Hmmh yeah, from reading the article I'd say you can't be too sure. I didn't find any solid numbers to back up the claim. Seems to be like with other STIs and infections. Protection helps, but not fully. And as it's infectious, a low number of contacts shouldn't make you certain about anything. A lot of adults have it, so maybe once is one too many. And with this virus you kinda never know if you're infected because 90% of infections come without symptoms. You can also get them years later. And there doesn't even seem to be consensus what a negative test means. Could still have the virus in you, just at some undetectable level. And seems they're not yet really sure about what consequences that has on cancer. Also they detected virus strains on fingertips, hands. And there seem to be other ways of contracting it, although that's way less likely.
I see one clear winner here. And that's the vaccine, before getting infected. Whatever that means for an individual. And sure, use protection, that lowers the odds of so many things, including this.