On what basis do you believe long covid is significantly causing adults to not hold down a full time job?
[1] https://www2.census.gov/programs-surveys/demo/tables/hhp/202...
Edit: to clarify, a lot of those 3.7 million people are probably suffering from acute Covid, but if you look back at the older survey data, the number of people not working due to "coronavirus symptoms" still seems to remain pretty high even when cases are low.