Science, not speculation, is essential to determine how SARS-CoV-2 reached humans. Issue 10296 (17th July 2021) - Calisher, Charles H; Carroll, Dennis; Colwell, Rita; Corley, Ronald B; Daszak, Peter; Drosten, Christian; Enjuanes, Luis; Farrar, Jeremy; Field, Hume; Golding, Josie; Gorbalenya, Alexander E; Haagmans, Bart; et al.