Five companies make swine flu vaccine for the U.S. market
— AstraZeneca’s MedImmune unit, CSL Ltd, GlaxoSmithKline Plc, Novartis AG and Sanofi-Aventis SA.

• Drug Companies Secretly Favor a World Flu Pandemic
• The Swine & Bird Flu Stock Index
• Hopes for a boost in demand for drugs to treat swine flu has ignited pharmaceutical stocks.
• The Top Swine Flu Vaccine Stocks under $20

AstraZeneca

• AstraZeneca AZN - Swine Flu Stocks to Watch
• AstraZeneca Mulls Second Swine Flu Vaccine Delivery System
• AstraZeneca gets $90 million U.S. flu vaccine order

GlaxoSmithKline 

• GlaxoSmithKline Leads the Way
• GlaxoSmithKline Gets Government Order
• GSK Making Progress with Pandemic Vaccine Development
• Donald Rumsfeld & Tamiflu

Novavax

• Swine flu fear lifts Novavax stock

Tamiflu, a pill known generically as oseltamivir, is made by Roche under license from Gilead Sciences Inc. Relenza, which is inhaled, is known generically as zanamivir and is made by Glaxo under license from Biota Inc.

Roche

• Swine Flu Stocks to Watch
• Roche In Pole Position To Treat Swine Flu

Gilead

• Swine Flu Scare: Stock Market Bonanza for "Politically Connected" BioTech Companies
• Swine flu fear a boost for Gilead

Drugmakers are working on intravenous formulations of both and BioCryst is working to perfect peramivir, which is designed to be given intravenously.

• BioCryst stock has increase 450% since April 2009
• BioCryst still undervalued

Crucell

• Crucell Scores U.S. Government Flu Contracthttp://www.nasdaq.com/aspx/company-news-story.aspx?