DM in Chhatisgarh tests COVID-19 positive even after getting vaccinated

A Jangjir-Champa DM in Chhatisgarh has tested COVID-19 positive even after taking both the shots of Coronavirus. The first dose of vaccine was administered on 8 February and the second dose was taken on 8 March but now the DM has been detected Corona positive.
It is really an unprecedented happening with an IAS officer who already had taken both the shots of vaccine and still has been found COVID-19 positive on the 11 March. He said that even after taking the vaccination dose he is positive, so the precautions should still be maintained even after the dosage.
Clearly, if more such cases would be seen then the whole purpose of getting vaccinated would fail.