Israel is dealing with a more aggressive strain right now (the UK mutation).

What they have found, according to our news sites at least, is that it is causing a lot more of the under 65 group to become severely ill. Some groups are more affected than others (for instance they are seeing that a relatively large amount of women who are in their late term of pregnancy are hit hard by this variant)

Making matters a bit worse is that the anti-vaccine propaganda has been quite successful in some areas, with some anti-vaxxers going as far as to book appointments only to intentionally not show up so that the vaccine is wasted.

In Hebrew, but interesting to look at if you want to follow the vaccination campaign https://datadashboard.health.gov.il/COVID-19/general