Long story short: two mutations allowed the virus to take hold in the upper respiratory tract, making it easy both to get infected and infect others.
Interesting, Science Tags
About
Technology, design, and bacon lover. Software engineer in San Francisco, CA.
Tags
Software
33
Interesting
28
Technology
23
Apple
20
Programming
19
iPhone
16
Internet
15
Video
13
Politics
13
Mobile
13
Archives
May 2012
1
May 2011
1
May 2010
1
January 2010
15
January 2009
51
May 2006
2
October 2005
13
May 2005
5
March 2005
12
October 2004
17
August 2004
15