No official sources from Shri Kashtbhanjan Dev Hanumanji Mandir have confirmed that the temple has been converted into a hospital.
However, there is no confirmation by the Temple administration neither on their official website nor on their official Twitter handle. In fact, no mainstream media have reported about the Salangpur Hanumanji temple being converted into a hospital.
The COVID-19 pandemic has given rise to a lot of potentially dangerous misinformation. For reliable advice on COVID-19 including symptoms, prevention and available treatment, please refer to the World Health Organisation or your national healthcare authority.