It's Winter and germs are everywhere - don't jump to conclusions!
I'd say as long as she's at a 3 or below on a "sick scale" of 10, go ahead and keep on trying if you can. We found that Day One was hard, Day Two was even harder, and Day Three we really started to see a turnaround, so I'd at least give it another day if you can (or if she lets you
). If she REALLY is resisting, like going backwards instead of holding steady, then go ahead and APOP - Accidental Parenting On Purpose LOL - and then start again when she's feeling better.
That's what I'd do, anyway.