Quanta had a decent write-up of challenges faced by some researchers about a month ago: https://www.quantamagazine.org/the-hard-lessons-of-modeling-the-coronavi

Quanta had a decent write-up of challenges faced by some researchers about a month ago: https://www.quantamagazine.org/the-hard-lessons-of-modeling-the-coronavirus-pandemic-20210128/ https://www.quantamagazine.org/the-hard-lessons-of-modeling-... Of course there are many ways that things went wrong, and not everyone made the same mistakes.