How COVID Kills Some People But Not Others – Doctor Explaining COVID

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How COVID Kills Some People But Not Others – Doctor Explaining COVID

How COVID Kills Some People But Not Others – Doctor Explaining COVID

Welcome to another video; I’m Doctor Mike Hansen; I am a real doctor specializing in pulmonary medicine, critical care medicine, and internal medicine for those who don’t know me.

Verify my board certification status:
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When I’m not working in the hospital or pulmonary clinic, I’m at home making these videos for you to deliver accurate medical expertise to the best of my ability (especially during this coronavirus pandemic).

⏩ Timestamps, click to skip ahead!
00:00 – Introduction
00:44 – How COVID Kills Some People (Starting of the explanation)
17:00 – How do we get COVID Patients with ARDS Better?
17:55 – Why do some COVID Patients get ARDS, and Why do some Die?
20:55 – What do we know about COVID?

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We know this coronavirus is mainly transmitted by respiratory droplets, and through contact, by getting into our mucosa, like our mouth, nose, and eyes. Although less common, it also can be transmitted through aerosol, meaning airborne. Most likely, when you have people in an enclosed space, such as an elevator, someone sneezes or coughs without covering their mouths, and someone else can inhale it in.

This covid attaches to cells in our body by this ACE2 receptor. This ACE2 receptor is only located on certain cells in our body. It’s on our tongue, in our nose, back of the throat, and in our lungs. Specifically, within the lungs, it’s only located on our type II alveolar cells.

We know that ARDS develops in about 4 to 5% of COVID patients. And of all the people who get Coronavirus, the mortality rate is around 1 to 2% or max 3%. So why do some COVID patients get ARDS, and why do some die? There are different reasons, and let’s talk about them. It could be one of these reasons, but more likely, it’s a combination of these reasons.

1. The coronavirus only gains entry into our cells that express the ACE2 receptor. They are located on multiple sites. Besides being in the lung, they’re in your mouth, nose, throat, stomach, small intestine, colon, skin, lymph nodes, thymus, bone marrow, spleen, liver, kidney, brain, and testes.

2. It makes sense that if the virus only gets into your mouth or nose, or throat, but not the lungs, it would cause only cold-like symptoms. But if the coronavirus gets all the way down into the alveoli of your lungs, that’s what’s going to cause ARDS. And by the way, the ACE2 receptors in your gut probably explain why some patients get nausea, vomiting, and diarrhea.

3. The amount of virus that you get into your body likely determines how sick you get. This is what we call the viral load.

4. The inflammatory reaction with COVID is extremely complicated, with many different proteins and hormones and interleukins at play. But there are several known genetic polymorphisms of these proteins that likely make some people more prone to getting worse illnesses than others. A genetic polymorphism simply means a variation on a particular gene. For example, there are genetic polymorphisms for the ACE gene, as well as IL-6. So, basically, a lot of it just comes down to our genes.

5. Because the 5th reason has to do with estrogen. Estrogen is known to inhibit the effects of IL-6, which plays a huge role in this cytokine storm. This might explain why women overall have the less severe disease compared to men.

6. The 6th reason is that people already taking certain medications for those on an ACEI such as lisinopril or an ARB like losartan, telmisartan, or candesartan, or irbesartan. Or people who take hydroxychloroquine for lupus or rheumatoid disease. Or people who take tocilizumab, an IL-6 receptor inhibitor. Are these COVID patients less prone to getting severe illnesses? My guess is yes.

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Doctor Mike Hansen, MD
Internal Medicine | Pulmonary Disease | Critical Care Medicine
Website: https://doctormikehansen.com/
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