BMJ Open: first published as 10.1136/bmjopen-2020-044101 on 5 January 2021. Downloaded from

BMJ Open is committed to open peer review. As part of this commitment we make the peer review history of every article we publish publicly available.

When an article is published we post the peer reviewers’ comments and the authors’ responses online. We also post the versions of the paper that were used during peer review. These are the versions that the peer review comments apply to.

The versions of the paper that follow are the versions that were submitted during the peer review process. They are not the versions of record or the final published versions. They should not be cited or distributed as the published version of this manuscript.

BMJ Open is an open access journal and the full, final, typeset and author-corrected version of record of the manuscript is available on our site with no access controls, subscription charges or pay-per-view fees (http://bmjopen.bmj.com).

If you have any questions on BMJ Open’s open peer review process please email [email protected] http://bmjopen.bmj.com/ on September 27, 2021 by guest. Protected copyright. BMJ Open BMJ Open: first published as 10.1136/bmjopen-2020-044101 on 5 January 2021. Downloaded from

ASSESSING POPULATION BASED SEROPOSITIVITY FOR ANTIBODIES AGAINST SARS COV2 IN CITY OF ForJournal: peerBMJ Open review only Manuscript ID bmjopen-2020-044101

Article Type: Original research

Date Submitted by the 27-Aug-2020 Author:

Complete List of Authors: Prakash, Om; Ahmedabad Municipal Corporation Solanki, Bhavin; Ahmedabad Municipal Corporation, Health Department SHETH, JAY; AMC MET Medical College, Community Medicine Joshi, Bhavin; Ahmedabad Municipal Corporation Kadam, Mina; AMC MET Medical College, Department of Microbiology Vyas, Sheetal; AMC MET Medical College, Department of Community Medicine Shukla, Aparajita; Smt NHL Municipal Medical College, Department of Community Medicine Tiwari, Hemant; Smt NHL Municipal Medical College, Department of Community Medicine Rathod, Sanjay; AMC MET Medical College, Department of Microbiology Rajput, Anil; AMC MET Medical College, Department of Microbiology http://bmjopen.bmj.com/ Trivedi, Toral; AMC MET Medical College, Department of Microbiology Ramanuj, Vaibhav; Smt NHL Municipal Medical College, Department of Community Medicine Solanki, Anand; AMC MET Medical College, Department of Community Medicine

Keywords: COVID-19, IMMUNOLOGY, VIROLOGY

on September 27, 2021 by guest. Protected copyright.

For peer review only - http://bmjopen.bmj.com/site/about/guidelines.xhtml Page 1 of 43 BMJ Open

1 2 3 4 BMJ Open: first published as 10.1136/bmjopen-2020-044101 on 5 January 2021. Downloaded from 5 6 7 8 9 I, the Submitting Author has the right to grant and does grant on behalf of all authors of the Work (as defined 10 in the below author licence), an exclusive licence and/or a non-exclusive licence for contributions from authors 11 who are: i) UK Crown employees; ii) where BMJ has agreed a CC-BY licence shall apply, and/or iii) in accordance 12 with the terms applicable for US Federal Government officers or employees acting as part of their official 13 duties; on a worldwide, perpetual, irrevocable, royalty-free basis to BMJ Publishing Group Ltd (“BMJ”) its 14 licensees and where the relevant Journal is co-owned by BMJ to the co-owners of the Journal, to publish the 15 Work in this journal and any other BMJ products and to exploit all rights, as set out in our licence. 16 17 The Submitting Author accepts and understands that any supply made under these terms is made by BMJ to 18 the Submitting Author Forunless you peer are acting as review an employee on behalf only of your employer or a postgraduate 19 student of an affiliated institution which is paying any applicable article publishing charge (“APC”) for Open 20 Access articles. Where the Submitting Author