A vast majority of the nation’s small businesses haven’t required their employees to get COVID-19 vaccines or be tested to return to work, although there were significant differences across sectors, a government survey shows. The U.S. Census Bureau’s Small Business Pulse Survey, released last week and based on data collected from some 25,000 respondents from Feb. 15–21, sought to measure the effects on small businesses of changing operating conditions because of the COVID-19 outbreak. Besides questions on how overall business has been affected by the pandemic, the survey also asked whether the business required its workers to test negative for COVID-19 and whether employees were required to provide proof of vaccination before physically coming to work. Nationwide, 70.1 percent of businesses said they don’t require a negative test, while 10 percent said they do, and 19.9 percent replied “not applicable, this business did not have employees physically coming to work …