Receiving emails re security alerts

Apple will never send a message like this, so you know that any messages like this are scams that are trying to trick you into buying useless software that will do nothing to help your phone, but it will slow it down. Or, worst case, the messages are trying to trick you into providing personal details.

Just ignore and delete any messages like this and keep working. NEVER click on a link in a message like this.

It is possible that one or more of your accounts was compromised, but this would have nothing to do with a "virus".