{Reference Type}: Journal Article
{Title}: Evolution and Antigenic Drift of Influenza A (H7N9) Viruses, China, 2017-2019.
{Author}: Zhang J;Ye H;Li H;Ma K;Qiu W;Chen Y;Qiu Z;Li B;Jia W;Liang Z;Liao M;Qi W;
{Journal}: Emerg Infect Dis
{Volume}: 26
{Issue}: 8
{Year}: 08 2020
{Factor}: 16.126
{DOI}: 10.3201/eid2608.200244
{Abstract}: After a sharp decrease of influenza A(H7N9) virus in China in 2018, highly pathogenic H7N9 viruses re-emerged in 2019. These H7N9 variants exhibited a new predominant subclade and had been cocirculating at a low level in eastern and northeastern China. Several immune escape mutations and antigenic drift were observed in H7N9 variants.