CFI and COVID-19: Elevated LDH levels were observed in many studies of Romanian patients [21,26,33,34,79], with one study focusing on how these values could be related to thrombotic microangiopathy by presenting a case report of a patient with a complement gene variant (complement factor I) [80] and another focusing on a pediatric case, signaling the risk for a systemic inflammatory syndrome associated with COVID-19 in some children [23].