From McKinsey: plotting the effects of COVID-19 against existing financial risk sheds light on the overall vulnerability of small businesses. The sectors most affected by the coronavirus and the least financially resilient include 1.7 million small businesses, employ 20 million workers, and earn 12 percent of US business revenue.

Read more here: https://www.mckinsey.com/featured-insights/americas/which-small-businesses-are-most-vulnerable-to-covid-19-and-when