Question

COVID-19 is caused by infection with the SARS-CoV-2 virus. This virus can infect the type II pneumocytes, a type of cell in the alveoli of the lungs that produce surfactants to ensure proper lung function. Type II pneumocytes have a diameter of about 9 μm. SARS-CoV-2 virus particles have a diameter of about 100 nm.

How much larger is a Type II pneumocyte than a SARS-CoV-2 virion? HINT: compare their volumes, assuming both are spheres! |

The Type II pneumocyte cell is 790,000X larger than a SARS-CoV-2 virion. |

How much wider is a Type II pneumocyte than a SARS-CoV-2 virion?

The Type II pneumocyte cell is_________ X wider than a SARS-CoV-2 virion.

Answer #1

1) Let us review the given facts.

Type 2 pneumocyte = 9micrometer diameter

The Sars-Cov2 = 100 nanometer diameter

Now we know that 1 micrometer = 1000 nanometer, therefore 9 micrometers = 9000 nanometers.

Since we have been asked to assume a sphere, let us take the diameter as the representation of width. In a sphere, the diameter is its widest point.

The question asked is how many times is a type 2 pneumocyte wider than a Sars-Cov 2 virion?

Translating that as an equation, we get.

**100 nm * x
=9000nm**

**x =9000/100**

**x = 90**

**Therefore a Type 2
pneumocyte is 90 times wider than an Sars-Cov2 virion.**

) COVID-19 is caused by the SARS-CoV-2 virus. As a virus it must
multiply within the host’s cells. Please explain how the immune
system would find and respond to this virus (as opposed to a
bacterial illness). You may use Influenza H1N1 if you
would prefer

Covid-19 infection caused by SARS-CoV-2 has raised a
major public health concern in healthcare facilities to prevent and
control the disease.
In this case, discuss in detail the environmental surface and air
contamination in COVID-19 patient rooms by illness severity in
healthcare-settings.
Answer should be 250 words

Section C – Mutation of SARS-CoV-2 Over Time
All viruses accumulate mutations over time, and different
classes of viruses have different mutation rates based on the
fidelity with which their genomes are replicated. Viral mutations
can affect the accuracy of tests, the efficacy of vac- cines, and
virulence (the ability to spread, the seriousness of illness,
etc.). In this section you will compare a number of sequenced
genomes from clinical samples during the first several months of
the COVID-19 outbreak...

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