Windows 10 mobile, does there need to be an antivirus or any other security software installed?

[Windows Central Question]

Windows 10 mobile security

Hei, is there need to be antivirus or any other security software installed on W10m? I know on WP 8 and 8.1 was no need to install this kind of software, but I do not know how W10m actually works, so that would be my question. What about internet banking, connection to MS account etc, is it 100% safe?
Thanks