A study published in scientific journal Science Translational Medicine. Using influenza surveillance networks to estimate state-specific prevalence of SARS-CoV-2 in the United
States has postulated that the actual prevalence of Covid-19 in the community may be 80 times the number that was diagnosed with laboratory tests. If we multiply the actual diagnosed cases of Covid-19 with the number 80 we may find that almost 50 % of population of some European countries have already been infected as of today. Another group from Oxford has postulated that the actual number of people who have been infected with Covid-19 may be much higher than what was reported.(Fundamental principles of epidemic spread highlight the immediate need for large-scale serological surveys to assess the stage of the SARS-CoV-2 epidemic.)