MSC Cruises on August 8 will implement a new protocol for passengers sailing from homeports in the USA after a change of health & safety requirements set by the CDC agency (Centers for Disease Control and Prevention).
The new changes are that kids unvaccinated for COVID aged 2+ years of age will have to show proof of a negative Coronavirus test taken within 3 days of embarkation and fully vaccinated passengers sailing 6 nights/longer from American ports must show proof of a negative test undertaken within 3 days of embarkation.
Fully vaccinated passengers sailing 5 nights/less from U.S. ports are recommended to have tested negative for COVID within 3 days of embarkation, but it's not a stipulation for boarding.
MSC's current COVID vaccination requirements remain in place for sailings from Port Miami and Port Canaveral until August 8. All passengers who are 12+ years of age must be fully vaccinated against COVID.