We are on this cruise and received this info.
Due to the itinerary of this voyage, guests ages 18 and above must be fully vaccinated for COVID-19 and, if eligible, have received a COVID-19 booster. Eligibility is determined by the U.S. Centers for Disease Control and Prevention (CDC) guidelines at https://bit.ly/cdc_booster. Only one booster dose is needed to be considered fully boosted, and boosters may be received any time up to embarkation. Guests ages 5 and above must produce a negative viral COVID-19 test (PCR or antigen test) taken within three days before cruise embarkation. Self-tests are now accepted. Additional testing may be required on board at times. All guests must attest to their COVID-19 vaccination status through Online Guest Check-In (https://bit.ly/HAL_OLCI). Masks may be required to be worn at times during your voyage to protect the health and safety of all on board. Review health and safety information at https://bit.ly/hal_twfaq S