“…The two paramyxoviruses have been associated with bronchiolitis and pneumonia in young children (9,17,23,48). Although some primates are permissible to hMPV (26,28,42) and hRSV (11) infections, we selected to study BALB/c mice and cotton rats as possible experimental models for hMPV infection because those small animals are considered useful and practical models for characterizing the pathogenesis of hRSV infection and for evaluating therapeutic and prophylactic approaches (7, 11, 12, 19, 22, 24, 33, 38, 39, 41, 45, 46, 50).…”