When you speak about the personal responsibility of each participant, please also take into consideration that participants paid 180sh to take part in the marathon. If half marathon was not cancelled, it means those who did not participate, just lost their money. Besides, the participants also trusted the authorities who declared half marathon not dangerous. Obviously, the responsibility lies, first of all, with the Health ministry who did not have the authority to cancel the event but who were obliged to give a warning on radio, TV, etc. that the event is dangerous and they call for the municipality to cancel it. For sure, after such a warning the municipality, would not have held the Marathon even if they were risking the lose the money invested.
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from the article: Investigate the Tel Aviv Marathon