Smell and taste changes provide early indication of COVID-19 community spread

Self-reports of smell and taste changes provide earlier markers of the spread of infection of SARS-CoV-2 than current governmental indicators, according to an international team of researchers. The researchers also observed a decline in self-reports of smell and taste changes as early as five days after lockdown enforcement, with faster declines reported in countries that adopted the most stringent lockdown measures.

source https://www.sciencedaily.com/releases/2020/11/201111153107.htm