Many people infected with COVID-19 don't actually have symptoms When is the most contagious?

More than 40 percent of people infected with COVID-19 in Italy's first outbreak are asymptomatic in the town of Von, in Italy's Veneto region, with about 3,200 residents.
February 20 this year, the town reported the first death of COVID-19 patients in Italy.
, the town's residents were quarantined for 14 days.
40 per cent of people infected with COVID-19 in the quarantined town of Vye this spring were asymptomatic, according to a paper published in the Journal of Nature in June.
about 2.6 per cent of residents tested positive for SARS-CoV-2 at the start of the town, but that number dropped to 1.2 per cent a few weeks later.
time, 40 percent of those infected had no symptoms.
also concluded that it takes 9.3 days for a person who tests positive to be free of the virus.
study was carried out by researchers at Imperial College London and the University of Padua in Italy.
researchers found: "Some asymptomatic infected people, completely unaware that they have carried the virus;
"If a certain number of people with symptoms test positive, it is often more difficult to identify and isolate the same number of asymptomatic carriers," said Dr. Enrico Lavezzo, a professor in the Department of Molecular Medicine at the University of Padua.
" raises concerns about the impact of infectious effects on people infected with COVID-19 and how long the infection can last.
when does the virus carry the highest load? According to the World Health Organization (WHO), the virus can be found in infected people one to three days before the onset of symptoms, with the highest viral load on the day of the onset of symptoms and then gradually decreasing over time.
for asymptomatic people, this level of infection appears to last for 1 to 2 weeks, and for patients with mild to moderate infections, the infectious level may last for three weeks or more.
data suggest that people may be more contagious when symptoms strike than in the late stages of symptoms.
SARS-CoV-2 is transmitted through the secretions of infected people, for example through saliva, respiratory secretions, and respiratory droplets.
risk of contracting the virus if you are in direct, indirect, or close contact with an infected person, or when you encounter an infected person coughing, sneezing, speaking, or singing.
such transmission makes asymptomatic transmission more widespread.
but the WHO does not deny that all studies of asymptomatic populations have limitations.
studies do not specify how to follow up on asymptomatic populations during testing to determine whether these asymptomatic populations show symptoms.
studies, "asymptomatic" is defined as a person who has never had a fever or developed respiratory symptoms, rather than a person who does not have any symptoms.
number of coronavirus cases worldwide currently exceeds 22 million, but the actual number of cases is likely to be much higher.
the Centers for Disease Control and Prevention (CDC) estimates that 40 percent of COVID-19 patients are virtually asymptomatic, making it difficult for health professionals to track transmission.
other data show that 16% of coronavirus transmission can be attributed to carriers of the virus showing no symptoms or only very mild symptoms.
these people, although contagious, may not realize that they have COVID-19.
Institute for Health Metrics and Evaluation at the University of Washington School of Medicine, IHME says wearing a mask from now on could save about 70,000 lives. Dr Christopher Murray, director of
IHME, says people pay more attention to wearing masks and staying socially alienated as infections increase, but as infections decrease, people tend to relax their guard and stop taking effective measures to protect themselves and others.
References: s1. WHO. WHO Coronavirus Disease (COVID-19) Dashboard. Data last updated: 2020/8/16, 11:38am CEST. Retrieved Aug 17, 2020 from .2 Transmission of SARS-CoV-2: Thess for the preventions. Jul 9, 2020. Retrieved Aug 17, 2020 from .3 Enrico Lavezzo, Elisa Franchin, Constanze Ciavarella, et al. Suppression of a SARS-CoV-2 outbreak in the Italian Municipality of V?. Nature. 2020 Jun 30. doi: 10.1038/s41586-020-2488-1. Imperial College London. "Whole-town study reveals more than than 40% of of coVID-19s had no symptoms." ScienceDaily. June 30, 2020. Retrieved Aug 16,2020 from .5 WHO. Coronavirus Disease 2019 (COVID-19) Situation Report - 73. Data as by national authorities by 10:00 CET 2 April 2020. Retrieved Ayg 16, 2020 from .6 WHO. Transmission of SARS-CoV-2: Thess for the preventions. Jul 9, 2020. Retrieved Aug 16, 2020 from s.7. This is when people with COVID-19 are at most contagius. Aug 16, 2020. Retrieved Aug 16, 2020 from .8 CBS News. Gottlieb Ask US Likely 'A Long Way' From Herd Immunity To Virus. Aug 16th, 2020. Retrieved Aug 17, 2020 from.