In this study, the functions of some segments of coronavirus were cleared by the comparison of homology among genes and proteins of influenza A and influenza B virus and SARS-CoV-2/covid-19(coronavirus). In addition, it is shown of existence of the identity segments across three viruses .It is suggested the possibility of being created that a new DNA vaccine ,a new RNA vaccine and a new medicine against common parts will be made which are effective against three viruses. Relative high homology among them suggests a possibility that people who were suffered from influenza A or influenza B infection within these from 1 to 2 years would be mildly affected by coronavirus. However, the influenza vaccine is an inactivated vaccine. The influenza vaccine is consisting of NTR (non translated region). It was proved the vaccine is not effective for the treatment of coronavirus infection. On the other hand, in particular, coronavirus segment 9 has a protein close of NP 1.2.3) (nucleocapsid protein) in influenza B virus, and coronavirus segment 11 has a protein close of NA1.2.3) and NB3) which are influenza A or B virus surface protein encoded in the lipid membrane of the virus particles. The result of this study is shown that the possibility of the anti-influenza medicine is effective for medication for the coronavirus infection until the specific medicine for coronavirus infection is approved.