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Category: Sciences

Evidence Synthesis: What is a “Covid death”

The WHO has decided to make Covid-19 a compulsorily registerable disease and has issued guidelines for attributing cause of death to the disease. “…A COVID-19 death is defined for surveillance

Analysis shows lack of data in communication on vaccine effectiveness

Research by the University of Waterloo’s School of Public Health and Health Systems says there is mandatory data regarding the efficacy of Covid-19 vaccines that is not being reported by

Evidence Synthesis: What is a “Covid Case”

Evidence Synthesis: What is a “Covid Case” What is a Covid case? The WHO has updated its Covid case definition (16 December). These continue to include suspected, probable and confirmed

Research: Attributes and forecasts of the long Covid

The possible complications of Covid-19, generically referred to as Long Covid, are one of the most popular topics and one of the most feared by the population. However, there is

Post hoc fallacy (or why do all home-made remedies cure colds)

A logical fallacy is an error in reasoning that renders a given argument invalid. The Post hoc or Post Hoc Ergo Propter Hoc fallacy is a common logical fallacy that

PCR tests: what procedures are used to identify “Covid cases”

PCR tests have been a fundamental part of the strategy that most countries have followed in fighting the pandemic, namely in identifying cases and deaths associated with the infection. In

The Authority bias

The authority bias is the tendency to overestimate the opinion of authority figures and obey their indications to the detriment of the analysis of the situation. Small details can reinforce

Cochrane review: effectiveness of masks and hand washing

Cochrane, a recognised organisation that conducts systematic reviews of high-quality studies, provided the update on ‘Physical interventions to interrupt or reduce the spread of respiratory viruses’. In this systematic review

Correlation: Confinements and mortality

In response to this pandemic, many countries have opted for extreme measures. General lockdown was introduced on the grounds that it was a way of decreasing transmission and hence mortality

Correlation and Causality: More than meets the eye

Our evolution has manifested itself largely in our ability to find patterns and trends with very little information. On the one hand, it has allowed us to develop ways of deciding quickly without having complete information (heuristics). For example, when we drive a car and make hundreds of decisions automatically.

The confirmation bias

The confirmation bias is the tendency to value, remember, interpret or even research information that confirms pre-existing beliefs. We often develop convictions with ease. Even on complex subjects, most people

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
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