No it doesn't suffer in the same way as Windows, says this is down the the way that system files are not accessible by
the user directly and also the need to give the system password to
make any changes at all to Ubuntu.

Not to say it can't be infected but the user needs to be tricked into
giving out that password when they shouldn't - so treat any request
that you get for this with suspicion if you are just web browsing or
opening e-mail. There is never any need for a web browser or e-mail
client to require root access... period <lol>