A 36-year-old male farmer presents with persistent high fever for 1 week, progressing to chills, high fever, body aches, lumbar muscle pain, conjunctival congestion, proteinuria (+++), inguinal lymph nodes the size of broad beans. From day 5 of illness, he develops continuous cough with hemoptysis, shortness of breath, gurgling phlegm in throat, heart rate 110/min, and cyanosis of lips. The primary treatment to control pulmonary hemorrhage is: