They are not alarming without some significant context. At the very minimum, what was the health status of the people who died? People at high risk of heart issues would be more likely affected. But also COVID itself causes heart inflammation, especially in young people, so the interesting ratio is really the chance of death from Covid vs chance of death from vaccine.

10 out of 96 can be either alarming or an amazing positive outcome. Without more context, it's not actionable and mostly irrelevant.