11y/o with selective iga deficiency

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My son 11 years old, selective iga deficiency. Chronic sinusitis,

pneumonia last year. Recieved booster shot last august prior to start

of school. Placed on 5ml's of bactrim from AUG untill approx 2weeks

ago. Did very will over the winter months. Off Bactrim for 2 weeks now

he is sick again. Placed on Augmentum, temps been as high as 103.5,

today is the 3rd day. Appointment with Immunologist Thursday, sounds

he will be placed back on the bactrim for the summer then recieve

another booster shot in August. Presented with option by his doctor as

to start IVIG Ifusion therapy or continue with the Im injection and

Bactrim. Injection last a few months then levels drop. Not sure what

course to take. I guess we are still in the trial and error stage. Not

sure were to go. Joined this site hoping to gain some insight, looking

for good news. Live in Cleveland ohio, Immunologist from Rainbows

babies and children Hospital. New to all of this!