No, iPhones don’t need Antivirus (any Apple device in general actually).
Samsungs are awful when it comes to security. My tablet was f*cked up 2 weeks after purchase and I did have an Antivirus (paid one, not a free app that doesn’t work).
@intheend It took me a while to find that q in there. Wow!
Do you use photos for your contacts?