Real-World Effectiveness of COVID-19 Vaccines (ChAdOx-1s, CoronaVac, BBIBP-CorV, mRNA-1273, and BNT162b2) in Jakarta: Protocol for Test-Negative Design of Health Care Data - Erlina Burhan; Farchan Azzumar; Fira Alyssa Gabriella Sinuraya; Muhammad Ilham Dhiya Rakasiwi; Ihya Akbar; Farhan Mubarak; Anggit Tresna Rengganis; Rizky Abi Rachmadi; Hera Afidjati (JMIR Research Protocols)