Justin J. Munns '04 said downloading the Norton anti-virus program prevented "Romeo and Juliet" from infecting his computer.
Oscar Eugenio Guido '04, however, was not so lucky.
"I got the virus from a friend," he said. "I didn't even open the attachment. It opened by itself."
Guido said the virus then sent itself to addresses in his inbox.
"One of my [teaching fellows] told me he received 19 e-mails from me," he said.
--Staff writer William M. Rasmussen can be reached at wrasmuss@harvard.edu.