Report to OPH. Immediately (24/7) report severe COVID-19 vaccine reactions requiring hospitalization to the Office of Public Health (OPH) at 1-800-256-2748.For more information, view the Health Alert Networks Message 20-52: COVID-19 Vaccination Severe/Allergic Reaction Reporting.. V-save. V-safe is a smartphone-based tool that uses text messaging and web surveys to provide personalized health ....