If, when entering your site, the antivirus says that it has detected a virus, this means that the files on your site have been modified. Recently, a virus has appeared on the Internet, which, once on a computer, does the following: - intercepts all FTP passwords - transfers this data to a script that, when accessing FTP, changes all index files, adding lines with a link to the virus to the page code.
And thus opening the site can be infected with a virus. We would like to note that in this case there is no virus on your site or on our server, but only the inclusion of a virus code in the pages of your site. The procedure to get rid of the consequences of the virus:
1) Check with an antivirus all computers from which FTP access to the site is carried out.
2) Change all FTP passwords.
3) Fix index files by removing virus code from them.