 Big number of Russian soldiers on Kupiansk front ill with rat bite fever. An outbreak of rat bite fever has been recorded in many Russian units on the Kupiansk front, increasing discontent among the Russians due to the inadequate provision of winter clothes and the lack of medical assistance. Ukraine's Defense Intelligence said this. Ukraine's Defense Intelligence said rat bite fever has a viral nature and is transmitted to humans from rodents through direct contact with the causative agent as a result of inhaling dust from mouse excrement or getting it into food. Symptoms of rat bite fever include a severe headache, a rise in body temperature, up to 40 degrees, rashes and redness, a decrease in blood pressure, hemorrhages in the eyes, nausea and vomiting several times a day. A person infected with rat bite fever experience intense pain in the lower back and has severe difficulty urinating as the disease affects the kidneys, Ukraine's Defense Intelligence added. Ukraine's Defense Intelligence noted that the Russian command ignored complaints about fever from its personnel, considering them as another manifestation of evasion from participation in combat operations. As a result, a rat bite fever significantly reduces the fighting ability of the Russian rats. The intelligence concluded.