Polish version doesn't say 37°C is normal. It says that "latest research shows that average temperature of a healthy adult is 36.8°C". However it also notes tha

Polish version doesn't say 37°C is normal. It says that "latest research shows that average temperature of a healthy adult is 36.8°C". However it also notes that in Poland and Russia the ideal temperature was considered to be 36.6°C, which is what I remember too.