K13-propeller gene polymorphisms of Plasmodium falciparum and the therapeutic effect of artesunate among migrant workers returning to Guangxi, China (2014-2017).

Background: The resistance of Plasmodium falciparum to artemisinin has been identified in Asia and some parts of Africa. The drug resistance of P. falciparum will be an obstacle to the successful elimination of malaria by 2025.

Antigenicity and receptor-binding ability of recombinant SARS coronavirus spike protein.

Severe acute respiratory syndrome (SARS) is an emerging infectious disease associated with a novel coronavirus and causing worldwide outbreaks. SARS coronavirus (SARS-CoV) is an enveloped RNA virus, which contains several structural proteins. Among these proteins, spike (S) protein is responsible for binding to specific cellular receptors and is a major antigenic determinant, which induces neutralizing antibody.