Thursday is the final day of COVID-19 vaccinations at Richmond Raceway, where officials have administered more than 160,000 shots during the past four months. Henrico County is shutting down the site after Thursday’s walk-up event concludes at 6 p.m. The final session will offer the Pfizer vaccine to anyone 12 or older who attends. Attendees should enter at Gate 7 of the raceway, 600 East Laburnum Avenue. In total, Henrico residents now have received a total of more than 306,000 doses of vaccine; more than 176,000 have received at least one dose, and nearly 142,000 (nearly 43% of all county...