Symptoms of the new strain of the PJ.2.1 coronavirus may resemble a cold or the flu, the World Health Organization told RIA Novosti.
"Based on symptoms alone, it is impossible to determine with certainty which respiratory virus caused the infection," experts said.
To determine the cause of the disease, it is necessary to perform tests, the organization noted.
Virologist Elena Melinikova previously told the agency that PJ.2.1 can be distinguished from other types of coronavirus by a severe sore throat and a longer loss of strength after illness.