Seven popular but mistaken ideas about the pandemic
1- A positive PCR test corresponds to an active infection by the virus In fact a positive PCR test can only confirm the presence of part of the virus, it…
Studies: Schools are not the main focus of Covid-19 infection. Children transmit less
The closing of schools is the wrong response to fight the coronavirus pandemic, and did not help in the fight against Covid-19, it simply removed a system that provides children…
Study: Why is the Covid mortality rate so different between countries?
The Covid mortality rate is more associated with social factors such as life expectancy, the public health context, the economy and financial support, and the environment (temperature and UV), than…
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…
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? The false positives and the non-infectious positives
Every day we are informed about the number of new infections by the “new coronavirus”, also known as “Covid-19 cases”. However, do the reported cases all correspond to infected people?…
What is evolutionary incompatibility?
What we are today is the result of millions of years of evolution. All of us are the result of an unbroken family line (of ancestors). For this it was…
What is science and why is it so important?
The emergence of modern science was one of mankind's greatest achievements. The scientific method has provided the accelerated production of evidence-based knowledge.
The availability bias
The heuristics of availability is one of our most important evolutionary legacies. It represents a process of cognitive simplification that leads us to perceive the frequency of certain events based…
