FILE - In this June 4, 2012, file photo, an empty barn at Belmont Park in Elmont, N.Y., is viewed. After a 4-year-old colt exhibited fever and neurological symptoms on Saturday, June 27, 2020, a barn at Belmont Park has been placed under a precautionary quarantine because of a suspected case of equine herpesvirus Type 1. (AP Photo/Mark Lennihan, File)

FILE - In this June 6, 2019, file photo, riders workout with horses at Belmont Park in Elmont, N.Y. After a 4-year-old colt exhibited fever and neurological symptoms on Saturday, June 27, 2020, a barn at Belmont Park has been placed under a precautionary quarantine because of a suspected case of equine herpesvirus Type 1. (AP Photo/Seth Wenig, File)