A citizen of Ukraine with measles (confirmed by a laboratory test) has arrived in Armenia after traveling from Kiev via flight PS 611, reports Armenia’s National Center for Disease Control and Prevention. The plane flew from Kiev on 24 February 2019 at 20:10 and landed in Yerevan on 25 February 2019 at 00:47. Armenian doctors urge all passengers of the given flight and those in the waiting hall of the airport at the moment of arrival to receive a measles vaccination, if they haven’t been vaccinated or lack 2 doses. Measles is a sharp viral and strictly contagious disease characterized by marked intoxication, as well as catarrhal and rashes. It is an airborne virus and stands out from other controllable viruses with its high level of contagiousness. Measles becomes more and more complex along with the main symptoms of the disease (intoxication, catarrhal, rashes). Among the graver complexities of measles are encephalitis, hepatitis, inflammation of the pancreas, hemorrhage, thrombocytopenia, myocardial inflammation and corneal inflammation. Among the extremely grave complexities that ends with death is subacute sclerosing panencephalitis, which is a slowly progressing form of measles encephalitis that is more often seen in children who have become diseased with measles before the age of 2 and eventually leads to the death of the patient in a couple of months.