Patients with oxygen (O^2) saturations > 93% on room air (measured by pulse oximetry) Uncontrolled asthma or O2 saturation < 90% by arterial blood gas analysis or pulse oximetry on room air Within 4 weeks prior to study enrollment: Pulse oximetry > 94% on room air or oxygen (O2) by nasal cannula Must have a minimum level of pulmonary reserve defined as ? grade 1 dyspnea and pulse oximetry of ? 88% on room air Patients who have a significant history of pulmonary disease that necessitates the use of supplemental oxygen, and patients with resting pulse oximetry < 92% on room air Pulse oximetry oxygen (O2) saturation < 90% at rest on room air Adequate pulmonary function as assessed by >= 92% oxygen saturation on room air by pulse oximetry Adequate pulmonary function as assessed by >= 92% oxygen saturation on room air by pulse oximetry Uncontrolled asthma or oxygen saturation < 90% by arterial blood gas analysis or pulse oximetry on room air. CELL PROCUREMENT: Subjects may not have an oxygen requirement as defined by pulse oximetry of < 90% on room air LYMPHODEPLETION: Subjects may not have an oxygen requirement as defined by pulse oximetry of < 90% on room air Must not require supplemental oxygen or have a pulse oximetry < 92% on room air Must have a minimum level of pulmonary reserve defined as =< grade 1 dyspnea, pulse oxygen > 92% on room air, and carbon monoxide diffusing capability test (DLCO) >= 40% (corrected for anemia) Must have a minimum level of pulmonary reserve defined as =< grade 1 dyspnea and pulse oxygen > 92% on room air Adequate pulmonary function as assessed by >= 92% oxygen saturation on room air by pulse oximetry Oxygen saturation as measured by pulse oximetry is > 93% on room air and no evidence of dyspnea at rest Oxygen saturation on room air > 92 % by pulse oximetry; (patients on intermittent or continuous supplemental oxygen are not allowed) Uncontrolled asthma or oxygen (O2) saturation < 90% by ABG (arterial blood gas) analysis or pulse oximetry on room air Pulse oxygen (Ox) >= 90% on room air Must have a minimum level of pulmonary reserve defined as ?Grade 1 dyspnea and pulse oxygenation > 91% on room air Must have a minimum level of pulmonary reserve defined as ? Grade 1 dyspnea and pulse oxygenation > 91% on room air Must have a minimum level of pulmonary reserve as ? Grade 1 dyspnea and pulse oxygenation > 91% on room air. Oxygen saturation on room air > 92 % by pulse oximetry; (subjects on intermittent or continuous supplemental oxygen are excluded) > 90% oxygen saturation on room air by pulse oximetry Uncontrolled asthma or oxygen saturation <90% by arterial blood gas analysis or pulse oximetry on room air; Must have a minimum level of pulmonary reserve defined as =< grade 1 dyspnea and pulse oxygen > 92% on room air Oxygen saturation as measured by pulse oximetry must be >= 93% on room air Adequate pulmonary function as assessed by >= 92% oxygen saturation on room air by pulse oximetry Adequate pulmonary function as assessed by >= 92% oxygen saturation on room air by pulse oximetry Pulse > 45 or < 120 Impaired lung function: O2 saturation 88% or less at rest on room air by pulse oximetry; if O2 saturation is =< 88% at rest, further pulmonary function tests (PFTs) should be ordered to confirm normal pulmonary function and eligibility Pulse > 45 and < 120 Patients with RSV infection limited to the URT as documented by negative chest radiographic findings within the last 48 hours of enrollment and pulse oxygenation of more than 90 mm of Hg on room air