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Pandemic

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 […]

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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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The origin of SARS-CoV-2 is still hotly debated

Since the first cases of COVID-19 in December 2019 in Wuhan, we have been trying to establish the origins of SARS-CoV-2. Currently, several hypotheses are being debated.    Firstly, did SARS-CoV-2 emerge from an animal reservoir (zoonosis)? A large majority of human viruses do, in effect, emerge from animal sources. Coronaviruses infect numerous species, including humans, […]

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The evolution of the pandemic in the United States during 2020

The United States was the country with the highest numbers of COVID-19  cases and deaths in the world in 2020. 3 waves of the epidemic followed in quick succession: the 1st in the springtime, after the virus first appeared in the country, affecting mainly urban areas; the 2nd during the summer, affecting mainly the south […]

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Can personal videos made by hospital workers help against COVID-19?

During the COVID-19 pandemic, people have had many questions about health matters. Naturally, doctors and nurses who are in the front line against the virus have been amongst the most listened to. Some of these front line staff have posted videos on social media with preventive advice or explanations about the illness, the virus and […]

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How do we combat misinformation?

For several months now, health professionals and patients have not only had to deal with the COVID-19 pandemic, but also with an “infodemic” caused by misinformation and disinformation. Numerous false rumours abound in the media and on social networks: for example, it is wrongly affirmed that masks are ineffective and may increase the risk of […]

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The emergence of the epidemic in Louisiana

The first case of COVID-19 was identified in December 2019 in Wuhan, China. By February 2020, the epidemic had spread and was detected in Europe, the Middle East, and in numerous other regions throughout the world. In the United States, the first case was identified retrospectively as having occurred a little earlier, in January 2020. […]

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The countless orphans of COVID-19

During the COVID-19 pandemic, priority has been given to prevention, detection, and responses to infection. While it is mainly adults who are at risk of dying from SARS-CoV-2, one aspect of the situation has tended to be neglected: the loss of parents or grand-parents, which can have severe consequences for children. Numerous studies, carried out […]

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Forecasting the pandemic’s evolution using PCR testing

Following the trajectory of the pandemic and forecasting its evolution is of vital importance to plan public health measures. The key epidemiological parameters are estimated by using figures of case numbers, hospitalisations and deaths.qPCR tests, although generally interpreted as simply positive or negative, give a semi-quantitative result in the form of number of amplification cycles […]

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Possible scenarios of the end of the pandemic

Vaccinations are our main hope of ending this pandemic. However, that does not mean that we will be finished withnSARS-CoV-2. There will still be many unvaccinated people, either because supplies in their country are limited, or because they refuse vaccination. In addition, vaccines do not always prevent transmission of the virus, and the length of […]

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