Italy tried moderate measures and would have suffered carnage if they hadn't locked down
ALL Scandinavian countries have suffered far fewer cases and deaths than N & W European countries - even normalised wrt population -
whatever the strategy followed
Sweden managed with an "acceptable" level of deaths
- still much higher than their Scandi neighbours, normalised or raw figures:
1,540 Sweden
355 Denmark
165 Norway
9 Iceland
How an epidemic grows depends on several factors that may differ between countries:
population density, single person / multi-generational households, huggy / distant culture ...
Maybe indeed Vitamin D levels too:
Scandinavian countries are high, N&W countries mostly low ,
e.g. UK low, Italy very low