Health officials in Argentina are investigating an unexplained pneumonia outbreak cluster linked to a healthcare facility in Tucuman province in the northern part of the country that has sickened 10 people so far, 3 of them fatally, according to government and media sources.

In a statement today, the Pan American Health Organization (PAHO), a regional office of the World Health Organization (WHO) said it received notification from Argentina's health ministry on Aug 30 about a cluster of 6 bilateral pneumonia cases (involving both lungs) due to an unknown source, 2 of them fatal.

PAHO said five case-patients are healthcare workers and one is a patient who is hospitalized in the intensive care unit (ICU) at a private clinic in the city of San Miguel de Tucuman.

Symptom onsets range from Aug 18 to Aug 22. Symptoms include fever, muscle soreness, abdominal pain, and difficulty breathing. Three patients were hospitalized and one is isolating at home in stable condition.