A patient in the Netherlands and another in Belgium have been confirmed as having been reinfected with the coronavirus, Dutch national broadcaster NOS reported on Tuesday, citing virologists.The news follows a report this week by researchers in Hong Kong about a man there who had been reinfected 4½ months after being declared recovered.The NOS cited virologist Marion Koopmans as saying the Dutch patient was an older person with a weakened immune system.She said that cases where people have been…