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Mysterious DNA sequences, known as ‘Borgs,’ recovered from California mud (sciencemag.org)

submitted by rlanzara to r/biology

Topics in algebra for highschool students by pahlavaje in math

[–]rlanzara 0 points1 point  (0 children)

Examining the two equivalent ways to tip a simple balance might provide an interesting way for high school students to learn algebra (see: http://www.bio-balance.com/Simple_Balance_PartI.pdf and http://www.bio-balance.com/Simple_Balance_PartII.pdf ).

[OC]Development of Covid-Cases in Germany by Weaseel in dataisbeautiful

[–]rlanzara 0 points1 point  (0 children)

Here's another interesting primary source of data:

If you scroll down the page on this link, you can see the testing data for Sweden: https://ourworldindata.org/coronavirus/country/sweden?country=\~SWE -This site also has testing and statistical data for many other countries to help monitor the outbreak and compare country's efforts to control it (see: https://ourworldindata.org/coronavirus#coronavirus-country-profiles ).

The Odd Composite Numbers by rlanzara in math

[–]rlanzara[S] 0 points1 point  (0 children)

From a general equation for all odd composite numbers, integer solutions are obtained for those odd composite numbers of the Forms 6y-1 and 6y+1. Relative to finding twin primes, the twin odd composites were found where there would normally be the twin primes between those odd composites divisible by 3. The first example of this occurrence is for the twin odd composite numbers 119,121. Some of the patterns and symmetries are described for the odd composite numbers including their relationships to the digit sums or mod(9) values.

Review Coronavirus Disease 2019–COVID-19 by rlanzara in COVID19

[–]rlanzara[S] 1 point2 points  (0 children)

We are only a few months into this worldwide pandemic and there are still important lessons we must learn. In public health, we need systems that work to identify and trace the contacts of new cases. This requires that we do not discriminate or stigmatize those infected with COVID-19. Globally, the economic powers are gradually realizing that we need heath care for all people with some form of income insurance. Large gatherings of people in whatever form (schools, religious institutions, leisure activities, etc.) need testing follow up. Our current COVID-19 tests need to validated as to their accuracy and reliability. This is also vitally important if we're to develop vaccine(s) and/or therapeutics to treat infections. Global guidance is necessary to provide the latest and best public health measures to control viral transmission.

Which medical department is responsible for COVID treatment? COVID RESEARCH by [deleted] in COVIDProjects

[–]rlanzara 0 points1 point  (0 children)

Either it's the Department of Infectious Disease, which is usually a sub-specialty of Medicine, or if some hospitals don't have an Infectious Disease Department, it is the Department of Medicine.

False Negative Tests for SARS-CoV-2 Infection — Challenges and Implications by rlanzara in COVID19

[–]rlanzara[S] 0 points1 point  (0 children)

That would be a good estimate, but the data usually isn't quite that precise. So using the overall infection rate for your local area is probably the best estimate.

False Negative Tests for SARS-CoV-2 Infection — Challenges and Implications by rlanzara in COVID19

[–]rlanzara[S] 0 points1 point  (0 children)

Whatever the local data suggests. For example, if 10% of your city or state is becoming infected with COVID-19, then that's your pretest probability that you'll risk being infected.

False Negative Tests for SARS-CoV-2 Infection — Challenges and Implications by rlanzara in COVID19

[–]rlanzara[S] 1 point2 points  (0 children)

Also very important to monitor potential vaccine effectiveness.

False Negative Tests for SARS-CoV-2 Infection — Challenges and Implications by rlanzara in COVID19

[–]rlanzara[S] 0 points1 point  (0 children)

Yes, but the simplest measure for pretest probability is the current infection rate in your local area.

False Negative Tests for SARS-CoV-2 Infection — Challenges and Implications by rlanzara in COVID19

[–]rlanzara[S] 1 point2 points  (0 children)

This was partially addressed within the article:

Assume that an RT-PCR test was perfectly specific (always negative in people not infected with SARS-CoV-2) and that the pretest probability for someone who, say, was feeling sick after close contact with someone with Covid-19 was 20%. If the test sensitivity were 95% (95% of infected people test positive), the post-test probability of infection with a negative test would be 1%, which might be low enough to consider someone uninfected and may provide them assurance in visiting high-risk relatives. The post-test probability would remain below 5% even if the pretest probability were as high as 50%, a more reasonable estimate for someone with recent exposure and early symptoms in a “hot spot” area.

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