KATHMANDU: Eighteen suspected COVID-19 patients, whose samples were sent to National Public Health Laboratory, tested negative on Thursday.

Information Officer of NPHL Rajesh Kumar Gupta said out of 18 samples, one was from Butwal while the rest were from hospitals in Kathmandu. He said the laboratory had conducted 547 COVID-19 tests since January and all of them turned out to be negative. He said 10 more samples would be tested on Friday.