https://www.scientificamerican.com/article/hundreds-of-people-volunteer-to-be-infected-with-coronavirus/ > Momentum is building to speed the development of coronavirus vaccines by intentionally infecting healthy, young volunteers with the virus. A grass-roots effort has attracted nearly 1,500 potential volunteers for the controversial approach, known as a human-challenge trial. > The effort, called 1Day Sooner, is not affiliated with groups or companies developing or funding coronavirus vaccines. But co-founder Josh Morrison hopes to show that there is broad support for human-challenge trials, which have the potential to deliver an effective coronavirus vaccine more quickly than standard trials.