Tripura became 'coronavirus-free' - and then cases surged. What happened?

After the first case was detected on April 6, 2 more cases got detected and all recovered by April 23- making Tripura "Corona-free"

Tripura is one of those few Indian States that has moved from a few cases to being declared “Corona-free”. But back again to a steep rise in the number of cases. The latter made Tripura the northeastern state with maximum prevalence and deaths (after Assam that is going through an added burden of calamities in the face of the pandemic).

After the first case was detected on 6th April, 2 more cases got detected and all recovered by 23rd April- making Tripura “Corona-free”. Only to surge soon after, from 2nd May onwards, in the form of a BSF battalion outbreak