"The [law] requires private employers covered by the Earned Safe and Sick Time Act to provide four hours of paid leave to employees who [1] accompany their children to COVID-19 vaccine injections and/or [2] care for such a child who is experiencing temporary side effects from a COVID-19 vaccine injection. The law does not distinguish between COVID-19 vaccine injections as part of a primary vaccination series and COVID-19 vaccination 'booster' shots."