The authors would like to acknowledge Dr Sukumar Das, Ex
Chief Medical Officer of Health, Purba Medinipur district, for
his kind permission to conduct the study. They also acknowledge
the health workers of Ramnagar-II block for helping with data
collection and Dr TK Pathak, Associate Professor, Department
of Microbiology, Midnapore Medical College and Hospital,
Minapore, for helping with serological tests.