The prevalence of 'silent' symptomless Covid-19 infection may be much higher than thought, according to a study which assessed cruise ship passengers under isolation during the current pandemic. Researchers, including those from Macquarie University in Australia, noted that the study offers the first analysis of complete Covid-19 testing of all passengers and crew on an isolated cruise ship during the Covid-19 pandemic.

from Times of India https://timesofindia.indiatimes.com/india/symptomless-covid-19-infection-may-be-more-prevalent-than-thought-study/articleshow/76060808.cms