Sweden covers 450km2 and has a population density of 20/km2. Israel covers 22,000 km2 with a population density of 365/km2. Not quite a like for like comparison, is it? Similarly, Sweden's GDP is approx $440 billion ($48k/capita) compared to Israel's $220 billion ($28k/capita). So Sweden is 20 times larger and twice as wealthy. I don't believe that Sweden is currently in state of war with several of it's neighbours either, nor does it have regular terrorist attacks to deal with.
WHO: Polio back in Europe for first time since 2010 (Reuters)