Burgas will take part in the celebration of the World Day of Pulmonary Hypertension - May 5. The campaign is held under the motto "Give a breath!". On this occasion, the building of the Municipality of Burgas will be lit in blue as a sign of sympathy with patients who are struggling with the incurable rare and insidious disease "blue lips". The most recognizable symptom of this rare disease is bruising of the lips, hands, and feet, which occurs due to lack of oxygen in the human body. Nearly 500 people are affected by pulmonary hypertension in Bulgaria.