Izaiah Wallis, the baby struck and paralyzed by a drunk driver in 2010, was admitted to Children's Hospital Thursday night.
Baby Izaiah caught pneumonia for the second time in a month, according to a nonprofit organization that supports the family.
In addition to Izaiah's pneumonia, his condition also requires a ventilator, tracheotomy, colostomy and feeding tube.
Doctors believe the baby's respiratory problems may be linked to the air inside the family's home, where his father cares for him full-time while his mother works.
This isn't the first time Izaiah has encountered respiratory problems. In September, his family was forced from their home due to potentially toxic mold inside the home's bathroom.
Izaiah needs a ventilator to help him breathe, and the mold spores could be weakening his already weak immune system, Verde told NBCSanDiego.
In October 2010, Izaiah was critically injured when he was struck by a drunk teen driver during a walk with his grandfather.
Passion 4 K.I.D.S. is fundraising to purchase the family a small handicapped accessible home. Tax-deductible donations can be made through their website.