The novel coronavirus, COVID-19, has sparked an outflow of scientific research seeking to
understand the virus, its spread, and best practices in prevention and treatment. If this international
research effort is going to be as swift and effective as possible, it will need to rely on a principle of
open science. When researchers share data, code, and software and generally make their work as
transparent as possible, it allows other researchers to verify and expand upon their work.
Furthermore, it allows public officials to make informed decisions. In this study, we analyzed 535
preprint articles related to COVID-19 for eight transparency criteria and recorded study location and
funding information. We found that individual researchers have lined up to help during this crisis,
quickly tackling important public health questions, often without funding or support from outside
organizations. However, most authors could improve their data sharing and scientific reporting
practices. The contrast between researchers’ commitment to doing important research and their
reporting practices reveals underlying weaknesses in the research community’s reporting habits, but
not necessarily their science.