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It was. Her previous pb was in April, here new pb was in May.
That seems like a lot of maturing in a short space of time.
There's a good summary here, including various pb calculators:
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More speculation though.
Do we know if she's got a coach? That alone could see a major improvement, be it through legal or non-legal means. When did she move to Andorra? Could regular training at altitude be a factor in her improvement?
Basically, there's loads of unanswered questions, but in my view simply accusing her of doping is the easy way. If you're going to do that (and I don't mean you personally) then you need to back it up with some evidence.
Wasn't this a few weeks ago? She's young too isn't she, so wouldn't you expect her times to improve as she matures?