Chest & Breathing Problems

My grandfather has recently been admitted to the ICU following a cerebral stroke. He subsequently has developed pneumonia. The doctor has reduced oxygen cylinder level from 8 to 5 and following that his SpO2 is around 85%. I didn't understand why the doctor did such a thing when he's suffering from pneumonia and condition is not improving.

I am having pain in my upper chest since the last 6 days with blocked nose and light coughing. No fever. Was feeling lots of pain the first day with a crushing feeling while moving and pressure in the upper chest. Hand/shoulder muscles also paining. Pain in the back behind my chest and some prickling sensations also there at times on my back. I'm having difficulty sleeping. (I had a cold for two weeks before this period with fever and cough with no chest pain that time). (I was previously a smoker for a few years but have quit smoking since a year). Kindly help me out and which doctor/specialist should I consult?

Patient complained of chest pain after falling from stairs on 30th December. Currently having fever, chest pain & nausea. X-ray done please suggest treatment

My 16 years old boy was tested positive for covid during the first week of November. After how many days he should be vaccinated?

This is my test report. Is it too infectious?. What is that 31 mean. Is it bad? Please I am tensed..

I had one sleep study where I become very anxious and was unable to sleep. I have another one scheduled , can I take sleep medicine or will it affect diagnosis? I have OSA or UARS

My father aged 67yrs old on prescribed  medicine seroflo 250 and fexomin m...since a week has cough and sneezing is due for covishield 2nd dose...can he take the vaccine or should wait

I need help from someone who can make me understand the report attached. It has been take from home base sleep apnea test hence reading percentage is not confirm with the polysomnography test at hospital.

I did an rtpcr COVID test which came back negative. But I am still having wheezing in chest and coughing (not a lot) since 4-5 days. No fever or anything else. The difficult in breathing is not a lot but wheezing is there. I have ashtma and i take serflo 250 inhaler as needed (not more than 10-15 times a year Max). 5 days ago i had a bad allergy attack. What to do?

I had 2 CT Scans with a gap of 4 months(during covid and post covid phase? Can they harm anytime later in life ?