In an effort to keep the general public informed, the Ministry of Health has been providing regular updates on continuing developments with respect to COVID-19. - Keep up to date with official news and advisories regarding the COVID-19 pandemic. 
Check ===> https://belizetourismboard.org/belize-covid-19-update/

Contact numbers should I have when traveling to Belize in case of an emergency?
Ministry of Health Hotline: 0-800-MOH-CARE (664-2273)
Belize Tourism Board Information Line: 1-800-624-0686

If you are a person with Business concern in Belize, or if you are foreigner that owns a property in Belize or a non-national who is seeking to stay in Belize for more than 30 days, you need an authorization to enter. Check ==> ​prescreentravel.covid19.bz/Landing