Experts in infectious diseases and public health officials are on high alert following the announcement of a new COVID-19 variant XBB.1.16, also known as Arcturus, by the World Health Organization (WHO). The WHO is keeping an eye on the new omicron subvariant, which has been found in over 20 countries (including the United States) and is believed to be responsible for the recent uptick in COVID-19 cases in India. Health officials have now confirmed the first death linked to the new COVID subvariant. According to Dr. Supakit Sirilak, director-general of Thailand’s Medical Sciences Department, an old man who was not...