<p>Baloxavir marboxil is a selective inhibitor of influenza cap-dependent endonuclease which prevents polymerase function and therefore influenza virus mRNA replication. It has shown therapeutic activity against influenza A and B virus infections, including strains resistant to current antiviral agents. This drug inhibits an enzyme required for viral replication, thus rapidly treating flu virus infection, and alleviating the symptoms associated with infection. A single dose of this agent was shown to be superior to placebo in relieving influenza symptoms and superior to both oseltamivir and placebo drug in virologic outcomes (marked by decreased viral load). The safety profile of Baloxavir marboxil compared favorably with that of oseltamivir, making it an effective treatment option for treatment of the flu virus, in one single dose.</p>