Poor thing. Sounds as if she's had (is having!) a hell of a time! But I suppose the doc is justified in not assuming the stings will get infected. They don't always. I've had a couple before which haven't, plus goodness knows how many mosquito bites that didn't (didn't give me malaria either), and innumerable midge and cleg bites. You can't prescribe anti-biotics just in case something gets infected, especially nowadays when they are less effective because we've used them too much in the past.
I'm very sorry your friend has had such a bad time. I know how sore an infected wasp sting can be 
🦞 The Lockdown Gang still chatting 🦞
What are you avoiding doing in this heat?



. But it's sweet of yous to express concern nevertheless
.