What is a Covid 19 death?
We constantly hear in the news phrases like "Covid has already killed X number of people in a given country" or "X number of people have died due to the…
A brief overview of the pandemic
On 3 March this year the WHO revealed the characteristics of this new virus detected in China. It would have a lethality rate of 3.4% which was the result of…
The two paradigms for tackling the pandemic
Despite the various perspectives on the response to this pandemic, there are two prevailing currents within the scientific community. Especially now that some evidence is more consolidated, these two fields…
Fight against Covid divides scientists: what the two ideological groups advocate
Although there are multiple views on the pandemic, two substantially different models share the preference of most researchers, policy makers and the general population. In this table, we summarize these…
Combate à Covid divide cientistas: o quadro resumo
Apesar de existirem múltiplas visões sobre a pandemia, dois modelos substancialmente diferentes, dividem a preferência da maioria dos investigadores, decisores políticos e população em geral. Neste quadro, condensamos essas duas…
First RCT on masks in the face of this pandemic
The first RCT study published on masks in the context of this pandemic found no statistically significant differences regarding the protection of their users. Historical background For decades research has…
Masks in the community: Are we following the science?
The usefulness of masks in the prevention of respiratory diseases is something very intuitive. If we want to prevent any agent from infecting us, putting something in front of our…
What is base rate?
The taxi problem (classic example of the base rate fallacy) There are two taxi companies in a city: one is GREEN, the other is BLUE. 85% of taxis are blue…
How Long Does Immunity Last After COVID-19?
There are currently four identified coronaviruses in circulation. Knowledge about the re-infection process with these endemic viruses may reveal characteristics common to all human coronaviruses. It is generally assumed that…
Is it true that we only use 10% of the brain?
Many people believe that we only use a small part of the brain. In an online survey conducted in the United States, the majority (65%) of the more than 2000…
Pyramid of scientific evidence: why the quality of evidence is important
One of the most important issues in the interpretation of different scientific studies is the degree of evidence that each represents. The pyramid of scientific evidence is an excellent representation…
What is a Covid case? What do the numbers tell us?
Is it correct to classify positive test cases as “new infections”? What do the numbers tell us? In the previous article on the Covid-19 cases we talked about the doubts…
