The Carnegie-Mellon Covidcast map draws together "self-survey" data gathered by Facebook and Google (for symptoms), but also on doctor visits and flu testing (by diagnostic healthcare manufacturer Quidel Corporation)
The district of Heinsberg was the first and hardest-hit region in Germany (250,000 inhabitants, 1615 infections, 55 deaths). In early March, scientists launched a wide-ranging household study in the community of Gangelt, turning the region into a COVID-19 "laboratory" for further predictions. In mid-April, the leading virologist Hendrick Streeck announced that the infection rate was at 15 percent, indicating the beginning of "herd immunity." He was criticized by Christian Drosten, a well-known virologist based in Berlin, for early publication of the findings, which he considered too vague.
UCSF's School of Medicine has added a COVID-19 dataset to its mapping software called Health Atlas.
The LA Times has created its own tracking website for Coronavirus cases and deaths. The data is collected from 58 county health agencies as well as the three run by cities. The source data is publically available on GitHub.