Patients admitted to an intensive care unit ICU treatment was reported for six (6%) of the 94 patients. Four of them had known underlying chronic diseases or predisposing factors: i) A two-month-old former preterm (male) with congenital heart defect was admitted due to desaturation and pneumonia. After treatment with oxygen and antibiotics, he was discharged after three days on PICU and 31 days in hospital. ii) A ten-year-old boy with chronic neurologic and lung diseases was treated at PICU for one day due to fever convulsion. iii) A ten-year-old boy with tuberous sclerosis as chronic disease was admitted to PICU due to fever convulsion and was intubated and mechanically ventilated at the PICU for five days because of hypopnoea. iiii) A sixteen-year-old girl with obesity (BMI >30) and nicotine abuse as risk factors was treated at PICU due to pneumonia and acute respiratory distress syndrome. She was mechanically ventilated at the PICU for four days due to respiratory failure.