The study that denies the WHO on asymptomatic infections


It is not clear whether that of theWHO either a communication problem or a substance problem. What is clear, however, also because of a bit of journalistic lightness, is that the only certainty of this pandemic is the uncertainty with which Ginevra faced the dossier coronavirus. Masks yes, masks no. Gloves yes, gloves no. Buffers only to suspect cases, or rather “test, test, test”. The last communication mess concerns when declared by the head of the anti technical team COVID-19, Maria Van Kerkhove, during a briefing of the UN agency: “It is very rare – he said – that an asymptomatic person can transmit coronavirus”.

The words of the Van Kerkhove have sparked an uproar. For Walter Ricciardi, a member of the WHO executive committee, this is an “inaugurated and wrong response”, given that “the transmission from symptomatics is typical of this virus” and that is what differentiates it from Mers and Sars. Andrea Crisanti, the now well-known virologist of Vo ‘, suggests a slimming cure to an organization where “there are too many bureaucrats and few experts with skills”. In the end, the expert backed out, stressing that it referred only to “a data set”. “We know – he said – that some asymptomatics can transmit the virus and what we need to clarify is how many are asymptomatic and how many of them transmit the infection.” The thesis is more or less the one reported by Rainier War, WHO assistant director: “The problem is that many of what we consider asymptomatic are actually paucisymptomatic, there are not many true asymptomatics.” It is as if there were “different types of asymptomatic” (Matteo Bassetti dixit) with a “different chance to infect”.

The times of science are not those of politics and the media. So to have a definitive answer it will perhaps be necessary to wait a little longer. But there is a reason if so many protest voices have risen from Italy. The reason is called “Abolition of the COVID-19 epidemic in the municipality of Vo ‘”, Ie the title of the study written by 36 Italian scholars led by Crisanti. As is known, in the small town on the Euganean Hills, scientists were able to test all residents twice a day, at the beginning and end of the red zone, at a distance of 15 days. Among the many information that the study has been able to provide, there is precisely the role of asymptomatics in the transmission of virus. “The trace of the contacts of the new infected cases and the reconstruction of the transmission chain – it reads – revealed that most of the new infections in the second detection were caused in the community before the block or by asymptomatic infected living in the same family “. A conclusion that seems to contradict what the WHO exponent said yesterday.

Scholars conducted an in-depth analysis of eight “new infections”Found in the second round of tampons, going to probe their past encounters and discovering that some of them had had interactions with asymptomatic individuals. “Subject 2 had contact with four infected relatives who showed no symptoms at the time of contact,” reads the document. “Subject 5 reported meeting an asymptomatic infected individual before the blockade” while “subject 8 shared the same apartment with two asymptomatic relatives.” Crisanti & co. they deduced that “asymptomatic infections can play a key role in the transmission of SARS-CoV-2“. “We also found evidence that transmission can occur before the onset of symptoms, as detailed below for a family group – reads – Subject A was the first confirmed SARS-CoV-2 infection in the family, detected on 22 February: the subject showed mild symptoms of the disease on February 22, was admitted to the Infectious Diseases unit on February 25 and subsequently discharged on February 29, with quarantine restrictions. The partner (subject B) and the children (subjects C and D) tested positive on February 23 but showed only mild symptoms and did not require hospitalization. Subject A reported having attended a family reunion three or four days before the onset of symptoms, together with a parent (subject E) and three other siblings (subjects F, G and H). At that time, they were all healthy. Nasal and throat swabs confirmed the presence of viral RNA in all family contacts. ” Translated: “The transmission dynamics within this family clearly show that viral shedding of SARS-CoV-2 occurred in the early stages of infection and in the absence of symptoms.” Finally, confirming the study, there would be the fact that “the viral load” in the symptomatic “does not differ significantly” from that of the symptomatic. Word of Chrysants.

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