Asymptomatic spread of Huanglongbing and Implications for Disease Control Huanglongbing (HLB, citrus greening) is a vector-transmitted disease that has nearly destroyed the citrus industry in Florida and is threatening other citrus-producing states. Recent research has shown that young flush shoots (newly emerging leaves) become infectious in a short amount of time after initial infection. In …

Multiple Peaks During Flu Pandemics