Study hints Covid-19 may have been in the US as early as December

Researchers believe they have found evidence that the novel coronavirus may have been circulating in the US as early as late December, about a month before the current timeline from the US Centers for Disease Control and Prevention shows. This study, published last Thursday in the Journal of Medical Internet Research, found a statistically significant uptick in clinic and hospital visits by patients who reported respiratory illnesses as early as the week of December 22. The researchers noticed this trend by looking through nearly 10 million medical records from the UCLA Health system, including three hospitals and 180 clinics.