Please make dua for my youngest brother

Assalamu Alaikum, My youngest brother is in the ICU right now. He’s 21 and has been diagnosed with severe pneumonia. He had no previous lung problems. They put him on oxygen (Airvo 2) and he’s shown some small improvements, alhamdulillah. They confirmed pneumonia with an X-ray and his CT and ultrasound didn’t show anything else obvious. At first the antibiotics didn’t seem to work, so the doctors switched him to antifungal treatment. He felt like he was improving with that, but the medical team says he’s been mostly stagnant - at least not worsening. They attempted a bronchoscopy to investigate further, but his oxygen dropped during the procedure (he’s been around 93–95 most days and fell to about 87–89 while they were doing it), so they stopped to focus on keeping his oxygen up. Right now he’s sedated and his sats are fluctuating between 87–93. The nurses haven’t been very encouraging and it’s been hard on us. Our family has been making dua constantly, but I was told the dua of a stranger can be especially powerful. I’m asking you, please keep him in your duas - we’d be so grateful. May Allah grant him shifa and patience to all of us, and reward everyone who prayed for him. Ameen. Sorry if this is messy; I’m a mess right now. I’m doing my best to stay strong and keep steady in my deen. I trust that Allah is the best of planners and He will carry us through, inshaAllah. Jazakum Allahu khairan for reading and for your duas.