That is not really a true statement; any operating system is capable of being infected by viruses,worms, etc. Windows has a much larger base, and is therefore more of a target than Unix.
Macintosh is based upon Unix, so when you compare the 2, you are comparing a type of unix and windows. Unix is generally thought of as safer and less susceptible to attack by viruses.
no completely no.
Unix systems may be affected by viruses .. see related link.
It isn't protected against all viruses .. see related link.
no
viruses
Windows Firewall can block viruses and malware coming from malicious websites. This can keep your computer from being infected or have your personal data stolen.
unix
Oncolytic viruses are viruses used in cancer treatment. They kill these viruses through chemical means in multiple stages by attacking infected cells.
PC viruses are usually 'contracted' from the internet - or by inserting an 'infected' disk into the computer's drive.
Unix uses anti-virus programs the same way other systems do; there is nothing present in the system to protect it from virus programs.
White blood cells