About communication error of COVID-19 infection test result

　In a PCR test for close contacts conducted by the Yokohama City Public Health Center through an active epidemiological survey, when communicating the test results to the person, it should be said that it should be "positive", but the wrong result was reported as "negative" Four cases were found.
　We have already contacted the patient of an apology and correction.
　The four health observation and recuperation periods have already ended, and no events such as physical condition deterioration have occurred.
　We would like to inform you of this and deeply apologize to all patients, their families and related parties.