One additional fact to keep in mind - the ability to smell hydrogen cyanide has a genetic component and 1 in 4 people will not be able to smell the "bitter almond" odour [1].

I do wonder how similar the smell of sweet and bitter almonds are, they are apparently different [2].

[1] https://academic.oup.com/occmed/article-abstract/67/9/662/47... [2] https://www.thespruceeats.com/what-are-bitter-almonds-180699...