Popularization of research advances on COVID-19


A model to study the epidemic’s dynamics

At the end of 2019, China reported unusual cases of pneumonia in the province of Wuhan. A few weeks later, the first cases of COVID-19 were detected, the 21st of January in the United States and the 24th of January in France. But there was a great deal of uncertainty concerning the introduction of the […]


COVID lays bare the inequalities of American health provision

The COVID-19 pandemic has led to innovations in terms of political organisation and coordination, but has also revealed weakness in the American health care system. Over the last two years, the system has focused on COVID-19 patients and on the prevention of transmission. But for those patients suffering from chronic illnesses, there have been fewer […]


Cases of infection even in vaccinated patients

The Pfizer-BioNTech vaccine has high efficacy against symptomatic COVID-19 infections. However, there have been cases of infection by SARS-CoV-2 in fully vaccinated individuals (2 doses), notably amongst health care staff who in general have greater exposure to the virus. Israeli researchers have looked at these types of cases in order to describe and analyse them, […]


Unprecedented health expenditure

The COVID-19 pandemic has refuelled the debate on health financing, which has been, and continues to be, very expensive. Governments have had to introduce public health measures such as the wearing of masks, lockdowns, diagnostic testing, contact tracing, various drug therapies, and vaccination. The economic global recession, with an estimated 3,3% worldwide slump in 2020, […]


Why is mortality higher in men?

There is a male/female disparity in mortality due to COVID- 19: men are at greater risk than women of developing a serious form of the illness and dying. They account for about 60% of deaths: while the scientific community agrees on this figure, there is less agreement concerning the reasons why. Researchers differ in their opinions. […]


Artificial intelligence to help with border controls

During the 1st wave of the COVID-19 pandemic, between April and July 2020, many countries banned non-essential travel so as to limit the spread of SARS-CoV-2. After the 1st wave, many European countries lifted these restrictions. States adopted different border surveillance systems, such as allowing travel only to countries with low rates of the virus, […]


How did the virus spread in Africa?

The African continent represents less than 4% of worldwide cases and deaths linked to COVID-19. However, these figures are possibly an under-estimation, since the 2nd wave of the pandemic in January 2021 was much more widespread in numerous countries. The majority of these countries quickly put preventive health measures in place, notably concerning international travel […]


Is it possible that smartphone apps promote inequalities?

Anti-COVID smartphone apps that enable contact tracing would seem to be a useful tool against the pandemic. These apps allow the tracing of infected people and their close contacts and advise those affected to be tested and to self-isolate. But they pose two major problems. Firstly, since these apps can transmit very personal information, how […]


Challenges specific to the most advanced African countries

By March 2021, some African countries had suffered two waves of infection with a total of more than 2,9 million people affected and more than 74 000 deaths. As is the case in other parts of the world, the effects of the pandemic are extremely variable from one country to another. These variations may be […]


Micro-droplets could be the most significant form of transmission

For a century now, scientists have believed that the main means of respiratory virus transmission is through droplets released by coughing or sneezing, which are deposited on the mucus membranes (eyes, nose or mouth) of a potential new host, or on a surface via which they can infect. These droplets can travel more than 1 […]

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