December 7, 2015 8:00 am Why RSV Is Dangerous for Infants RSV, a respiratory virus that infects the lungs and breathing passages, can be serious especially for infants. US & World Videos 4:36 ‘I felt like I was going to die': Mass. school violence victim speaks 1:59 Highly anticipated witness in Karen Read trial to take stand 4:04 Student violence impacts schools across Mass. 0:44 Deaths of 2 swans in apparent shooting under investigation 1:40 Berklee student speaks out about random attack