Seegene slipped into the red in the first quarter of this year due to a drop in the number of people testing for the virus as it is shifting to an endemic phase in much of the world, company officials said Friday. The COVID-19 PCR test kit maker posted a 13.8 billion won ($10.35 million) operating loss for the first three months of 2023, while sales plunged to 90.1 billion won.