https://www.cnn.com/2020/05/04/health/france-coronavirus-december-death-intl/index.html
If a death was caused in December, the virus was likely already endemic in the population weeks beforehand. That is 3-4 months of solid spread before the lockdowns commenced
If a death was caused in December, the virus was likely already endemic in the population weeks beforehand. That is 3-4 months of solid spread before the lockdowns commenced