FREE newsletter is as good as that first pint back at the pubNorth Korean has finally admitted it has enhanced border controls is a “preemptive countermeasure” to fight the coronavirus.The rogue state’s controlled media said on Tuesday that leader Kim Jong-un called for the nation to be put on “maximum alert” against Covid-19.He is understood to have held a meeting where he urged North Koreans to remain vigilant to the disease and that easing anti-coronavirus measures would lead to an “unimaginable and irretrievable crisis”.The Minju Joson newspaper said North Korea had “completely shut down its border, territorial air and sea and continues to strengthen its work to completely prevent the flow of the coronavirus”.It continued: “We are.