PT  - JOURNAL ARTICLE
ED  - , 
TI  - Is Infectivity a Zero-Sum Game?
AID  - 10.1126/science.299.5613.1621j
DP  - 2003 Mar 14
TA  - Science
PG  - 1621--1621
VI  - 299
IP  - 5613
4099  - http://science.sciencemag.org/content/299/5613/1621.10.short
4100  - http://science.sciencemag.org/content/299/5613/1621.10.full
SO  - Science2003 Mar 14; 299