Number of people subjected to serological in Greater Kolkata using nucleoprotein N as the coated antigen.

Supplementary Table 1: Number of people subjected to serological in Greater Kolkata using nucleoprotein N as the coated antigen.

	Greater Kolkata
	351
Male	222
Female	127
Working Class¹	78
Middle Class	273
Seropositive	33%

¹Working class is defined people who use community utilities in greater Kolkata. The middle class is defined by people who do not belong to the richest class but live independently.