TIMOUR AZHARI  AS a career musician who has played brass and wind instruments for most of his life, Joseph al-Hajj, 80, was particularly anxious to protect his most precious asset - his lungs - when the coronavirus swept into Lebanon last year. Hunkered down in his modest home in the mountains for months on end, Hajj said he pinned his hopes on the global race to develop a vaccine against the respiratory disease. So last month, when he saw lawmakers younger than himself jumping the vaccination queue, he felt impelled to fight for his right to be vaccinated - filing…