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COVID-19: The President’s Infection (Part 4 of 4)

COVID-19: The President’s Infection (Part 4 of 4)

by

Columbia University Professor Emeritus, Dr. David Figurski

presented by

Donna O’Donnell Figurski

(Disclaimer: The World Health Organization <WHO> has officially named the new coronavirus as SARS-CoV-2 and the disease it causes as COVID-19. Because the majority of people, including much of the press, commonly refer to the virus as “COVID-19,” to avoid confusion I use COVID-19 as the name of the virus in this post.)

David H. Figurski, Ph.D & Survivor of Brain Injury

The President returned to the White House Monday evening. Was that too soon? Was the President at risk? Was he contagious?

The President’s doctors at Walter Reed were comfortable with his leaving the hospital because the White House has its own doctors and medical facility. Remdesivir is given IV for five days. Putting in an IV line would not be a problem at the White House. If the President needed supplemental oxygen, a chest X-ray, antibiotics, etc., they are readily available. The doctors at the White House can also do the daily blood tests needed to monitor the state of the President’s immune system and his propensity for clotting. Dexamethasone is usually prescribed for ten days, but an oral form is available.

Two important questions loomed. Is the President immune? And, is the President contagious?

The conferral of immunity by COVID-19 infection is a major question yet to be answered. If there is protective immunity and, if so, how long it lasts are major concerns of vaccine producers. There are now reports of people being infected with COVID-19 a second time. Immunity may depend on the severity of the initial infection and the robustness of the consequent immune response. There has been a report of mild or asymptomatic infections that do not elicit an antibody response. Are these people more vulnerable to a second infection? Alternatively, was their response so effective without antibodies that the virus could not become established and cause symptoms?

Is the President contagious? We can’t say without knowing his test results. Dr. Griffin considers a patient virus-free if that person has two negative tests on two consecutive days. Otherwise, a person is considered to be potentially contagious for 20 days. Since the doctors are permitting the President to hold rallies, I assume he is not thought to be contagious.

Dr. Griffin’s extensive experience with COVID-19 patients has allowed us to surmise what was happening with the President’s infection. The President appears to have completely recovered from his COVID-19 infection. But, several questions remain.

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COVID-19 — It’s Everywhere . . . Breakthrough in Basic Research May Defeat COVID-19

Breakthrough in Basic Research May Defeat COVID-19

by

Columbia University Professor Emeritus, Dr. David Figurski

presented by

Donna O’Donnell Figurski

 

(Disclaimer: The World Health Organization <WHO> has officially named the new coronavirus as SARS-CoV-2 and the disease it causes as COVID-19. Because the majority of people, including much of the press, commonly refers to the virus as “COVID-19,” to avoid confusion I use COVID-19 as the name of the virus in these posts.)

David H. Figurski, Ph.D & Survivor of Brain Injury

 

Exciting results indicate that a novel idea might bring COVID-19 under control.  The new technology has been shown to work at the lab bench.  Now scientists are doing animal studies and, later, human studies.

Scientists at Boston University (BU) and the University of California at San Diego (UCSD) have made coated nanoparticles that are covered with pieces of lung cell membrane. (About 1000 tiny particles, or “nanoparticles,” can line up in the space equal to the width of a human hair.) The coated nanoparticles mimic the lung cells that normally bind the virus and allow an infection to start.  But, when the virus tries to infect a coated nanoparticle, the virus dies.  Essentially, the coated nanoparticle is a lethal decoy.

Research in the lab indicates that the new technology might be able to end the COVID-19 pandemic. Also, if the technology works in humans, coated nanoparticles will likely be important for inactivating other viruses and for dealing with future pandemics.

Specific nanoparticles can be made to mimic any cell that any virus infects.  So, coated nanoparticles can be made that are specific for any virus (for example, for influenza virus or for Ebola virus).  Also, once the cell normally infected by a previously unknown virus to start an infection has been identified (as it was for COVID-19), the relevant coated nanoparticles can be made. So, a novel virus can be inactivated even though little is known about the molecular details of its biology.

Scientists were surprised to learn that the coated nanoparticles for COVID-19 bind the SARS-2 coronavirus even better than the lung cells normally infected by the virus.  So, this approach for COVID-19 is likely be very efficient.

In COVID-19 infections, sometimes the immune response is too active and causes severe disease or death.  The dexamethasone breakthrough I wrote about earlier works by dampening the immune response.  The scientists surprisingly found that coating another batch of nanoparticles with membrane pieces from cells of the immune system also dampened the immune response.

The scientists envision a protective coated nanoparticle mixture for COVID-19 that has two types of coated nanoparticles (one that mimics the lung cells that are infected and another that dampens the immune response). The mixture would be simply administered as a nasal spray.

 

Stay Safe and Healthy!

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COVID-19 — It’s Everywhere . . . Drug Breakthrough Significantly Prevents COVID-19 Deaths

Drug Breakthrough Significantly Prevents COVID-19 Deaths

by

Columbia University Professor Emeritus, Dr. David Figurski

presented by

Donna O’Donnell Figurski

 

(Disclaimer: The World Health Organization <WHO> has officially named the new coronavirus as SARS-CoV-2 and the disease it causes as COVID-19. Because the majority of people, including much of the press, commonly refer to the virus as “COVID-19,” to avoid confusion I use COVID-19 as the name of the virus in these posts.)

COVID-19

David H. Figurski, Ph.D & Survivor of Brain Injury

Research at the University of Oxford in England showed for the first time that a drug prevented a major fraction of deaths in severely sick patients with COVID-19.

Dexamethasone was found in a large clinical trial to cause a significant reduction in deaths. It can be prescribed as pills, and it is a common, readily available, and relatively inexpensive drug

A major problem after infection by COVID-19 is that the immune response of some individuals is too aggressive (often causing what’s called a “cytokine storm”) and can lead to death. Because dexamethasone is a steroid that dampens the immune response, the prediction was that it might help to prevent deaths by COVID-19.

The research showed that it does.

There are about 3 deaths for every 8 patients on ventilators.  Dexamethasone treatment reduced those deaths by one-third.  So, 1 death would be prevented for every 8 patients on ventilators.  About 5 deaths occur in every 25 patients on oxygen only. Dexamethasone treatment reduced those deaths by one-fifth, or about 1 less death for every 25 patients on oxygen only. Dexamethasone treatment had no effect on patients not on ventilators or receiving oxygen only.

Given that a major fraction of the over 118,000 deaths in the US so far (at 6:00 pm ET on June 18, 2020) were on ventilators or oxygen only, dexamethasone treatment is predicted to prevent many deaths.

The UK’s Chief Scientific Adviser, Sir Patrick Vallance, said: “This is a ground-breaking development in our fight against the disease, and the speed at which researchers have progressed finding an effective treatment is truly remarkable.”

 

Stay Safe and Healthy!

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