Hi Mr_Susan , welcome to the forum! What a set of horrid happenings, and all credit to you that it hasn't put you off returning to C25K.
After all those illnesses, particularly Covid, I don't think that restarting at week 5 is advisable. Going back to the beginning again would be the most prudent way to go about things. If you simply couldn't face that, then maybe start from week 3.
My experience is that even if you feel fit after recovering from illness, your muscles, tendons and ligaments might not be as fit as your aerobic system, and by ramping up too fast or continuing from where you were before illness, you are putting your system under considerable strain.
I recently pulled a muscle and posted my sleuthing on the source of that incident.
It’s hopefully an interesting read but there is a serious note behind all that…. in essence, take it slow, specifically when recovering from a break.
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