Brainard (2020) describes the early-pandemic surge in COVID-19 research literature. By May 13, more than 23,000 related papers had appeared since January, the literature was doubling about every 20 days, and more than 4,000 papers had been released during the preceding week. Researchers could not read and assess every paper's contributions, conclusions, limitations, and evidentiary quality. Responses combined accessible or curated paper collections with AI-assisted search, but paywalls, noisy collection criteria, incomplete full text, and doubts about algorithmic quality judgments limited these tools. The linked Science reference provides the source: https://doi.org/10.1126/science.abc7839