XK and influenza: The drug-resistance to NA inhibitors represents a new challenge for antiviral therapies treating influenza (Huang et al., 2018), even though Peramivir (Babu et al., 2010) and Laninamivir (Yamashita et al., 2009) are effective against Zanamivir- and/or Oseltamivir-resistant influenza viruses.