Mariposa County Unified School District Thursday, March 12, 2020 Update on COVID-19 (Coronavirus) Details Last Updated: Thursday, 12 March 2020 11:54 Published: Thursday, 12 March 2020 11:54 View Comments March 12, 2020 - Mariposa County Unified School District Thursday, March 12, 2020 update on COVID-19 (Coronavirus). Source: Mariposa County Unified School District View the discussion thread. back to top