It's like few cases per season per million people eating wild shrooms.

How many millions of people go mushroom hunting?

Given approximately everyone's heard of it, and warnings about it, but also the I don't personally know anyone who tells me that they personally do, my guess is in the order of 1% of the population. Might be more, might be less.

1% of Russia would be 1.5 million (and given this thread, 412k for Ukraine).

1%?!

According to the 2014 survey https://fom.ru/Obraz-zhizni/11711 , 75% Russians have ever went to pick up mushrooms, and 40% have done it in the last year before the survey. 8% personally know people who suffered from mushroom poisoning.

This corresponds to my expectations: I'm from a neighbouring country, Belarus, and basically almost everyone around me has been picking up mushrooms.

That's not just a culinary experience, but a way to relax: go to forest, disconnect from the world, unwind. (People also pick up blueberries and lingonberries for the same reasons.)

Oh, and my classmate died from mushroom poisoning.

Wow, OK, I'm surprised by those numbers.

Probably many millions? It's a pretty popular thing to do in Eastern Europe.

Plenty.

Just like for road accidents, death is a wrong measure, as it really depends on your health, i.e a 20 years forager will survive whereas an 80 years old one would die. Many mushrooms are liver-toxic, so if you already have hepatitis (very common in Russia), you're probably more prone to die from a poisonous one.

Intoxication leading to hospitalization is a better measure.

Ah, just wait until another Russian scientist or business person gets hit by lightning.

Suicide by lightning twice to the back of the head is on the rise in that part of the world.