
Her antibody levels for Parvo would of course be high as the has had the illness.
With the others being low I would suspect that her puppy vaccinations did not take (too early to clear maternal antibodies, or just one of those where the vaccine won't take), and this is why she caught Parvo.
To be sure if it was just too early vaccination or she cannot take up the vaccine I would ant to titre test her after this vaccination to see which ti was.
This thread and a couple of experiences really do make me feel that puppies should not have their second jab of puppy course until over 12 weeks as was normal in the past.
Better to wait a little longer for primary vaccinations then to have in effect an unprotected puppy for a further year if the vaccine does not take due to being blocked by maternal antibodies.
I know that in the USA it is normal to give a third doses at over 16 or 20 weeks just to be sure the vaccinations have taken.
This is the new 2011 protocol in the USA/Canada
https://www.aahanet.org/PublicDocuments/CanineVaccineGuidelines.pdfInitial Vaccination (,16 wk of age)
Initial Vaccination
(.16 wk of age)
Recommendation Comments and Recommendations
CDV (MLV) or rCDV Puppies should be vaccinated every 3-4 wk between the ages of 6 and
16 wk (e.g., at 6, 10, and 14 wk, or 8, 12, and 16 wk). To minimize the
risk of maternal antibody interference with vaccination, the final dose of the
initial series should be administered between 14 and 16 wk of age,
regardless of the product used.
Revaccination (Booster)
One dose is considered protective and acceptable. Revaccination is recommended every $3 yr after completion of the initial vaccination, regardless of the product