This is the hypothesis of a new study by the Americans CDC, according to which those who tested positive for the coronavirus have an association with the presence in restaurants in the previous two weeks
Go to eating out o bersi un coffee at the bar could put us more at risk of getting infected with the new one coronavirus. Is this thehypothesis of the Americans Centers for Disease Control and Prevention (Cdc) who found that positive al Sars-Cov-2 reported having dined in a ristorante in the 14 days prior to buffer almost double the percentage of those who tested negative. The data from the new research, which comes when most U.S. states are allowing people to dine indoors again, must be taken with great caution, however: sample of participants, in fact, is very small and no distinction has been made between the masks used by participants neither between outdoor or indoor dining. Much more in-depth studies will therefore be needed to confirm these new results.
In the study, the researchers involved a total of 314 participants, of which 160 negative people al buffer (control group) e 154 patients results positive for coronavirus in 10 states between 1 and 29 July last. Participants were asked to fill in some surveys and respond to interviews regarding activities carried out in the last two weeks. From the responses, the researchers noted that about the same percentage of participants in both groups reported that they always wore the mask in public places (71% of positive cases compared to 74% of negative cases). Furthermore, the data did not reveal significant differences between the two groups in the risk of becoming infected for it shopping, business meetings, visit a friends house e relatives, or even for whoever had gone in gym, from hairdresser and in a place of worship.
A significant association, on the other hand, emerged among those who tested positive for the new coronavirus and having eaten in a ristorante in the two weeks prior to the swab. The association was explained by measuring the so-called p-value (in this case equal to 0.01), a value that helps to understand if the difference between the observed result and the hypothesized one is due to chance or if it is statistically significant. These data, the researchers explain, suggest that people become infected where they need to to remove masks, for example for eating and drinking. “The ventilation and the intensity of the airflow could affect the transmission of the virus, although the measures of social distancing and the use of masks are implemented according to current guidelines “, we read in the study. “The masks they cannot be worn effectively while eating and drinking, while shopping and numerous other indoor activities do not preclude their use ”. As the researchers suggest, strategies should therefore be considered for reduce possible exposures in places where you eat and drink on the spot to protect customers, employees and the community.
The data also revealed another significant association: those who tested positive were more likely to have been in close contact with a case of Covid-19 confirmed (42% compared to 14% of negatives). In 51% of cases, the researchers point out, close contacts were members of the family. However, the study has some important limitations: in addition to the small sample size (there are those who refused to answer and those who did not want to participate), the researchers did not describe the severity positive patients, did not ask the participants which ones masks they wore and whether they ate outdoors or, instead, indoors. More extensive and detailed studies will be needed to confirm these results.
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