[Japanese expert analysis: more than 85% of patients receiving three doses of vaccine successfully prevent severe pneumonia] according to Kyodo news agency, the "Japan ECMO Network", which is composed of Japan's National Institute of Infectious Diseases and treatment experts for critically ill patients, released a summary of analysis results on May 11, according to the survey of hospitalized patients infected with novel coronavirus O'Mick strain. More than 85% of patients who received three doses of vaccine successfully prevented severe pneumonia.