1. H1N1 influenza virus biosafety guidelines for laboratory workers 2009
2. Centers for Disease Control and Prevention (CDC). 2009. Update: infections with a swine-origin influenza A (H1N1) virus—United States and other countries, April 28, 2009. MMWR Morb. Mortal. Wkly. Rep.58:431-433.
3. Centers for Disease Control and Prevention (CDC). 2009. Update: swine influenza A (H1N1) infections—California and Texas, April 2009. MMWR Morb. Mortal. Wkly. Rep.58:435-437.
4. N. Engl. J. Med. 2009
5. N. Engl. J. Med. 2009