BEIRA, Mozambique (AP) — A cholera vaccination campaign is kicking off to reach nearly 900,000 cyclone survivors in Mozambique as officials rush to contain an outbreak of the disease.

Vaccinations are beginning on Wednesday morning in the hard-hit city of Beira, where most of the more than 1,400 cases have been reported since the outbreak was declared a week ago.

Mozambican authorities have reported two deaths so far from the acute diarrheal disease, which can kill within hours if not properly treated.

Cases also have been confirmed in some outlying communities and vaccinations will begin there on Thursday.

Overall the campaign aims to vaccinate some 884,000 people in Beira, Dondo, Nhamatanda and Buzi.

More than 100,000 survivors of Cyclone Idai are still living in displacement camps with little access to clean water or sanitation.