"Burials activity in Jakarta increased sharply two months prior to the first laboratory confirmation of SARS-CoV-2 infection in Indonesia ... Our findings suggest SARS-CoV-2 probably began circulating in Jakarta during December 2019 but remained undetected until early March 2020"https://twitter.com/d_naluri/status/1339042200445800449 …
This is also in line with the sharp increase in BPJS claims for "pneumonia" which became more pronounced mid-January.