The Virus Bulletin tests try to catch out anti-virus software with a variety of malicious programs including bots and worms known to be spreading online, file infectors, polymorphic and macro viruses.

BBC: NEWS | Technology | Windows 'fails' active virus test

The PCs are recruited using viruses and worms that compromise machines via known vulnerabilities or by tricking people into opening an attachment infected with the malicious program.

BBC: PC hard drive, Eyewire

According to the Web site Ecouterre.com, the dress is made from what's sometimes known as ahimsa, or "peace silk" a material spun from cocoons without killing the worms inside.

NPR: Red Carpet Awaits The Star In The 'Eco-Dress'