The UK Department has reported significant drops in the level of swine flu cases in the UK. But with winter coming for the Northern Hemisphere, At risk groups have been reported as the first to receive swine flu vaccine.

Crucell NV is currently developing the only adjuvanted flu vaccine against the influenza virus licensed for all age groups but Crucell stock hasn’t match analyst expectations showing a 20% increase since April 2009.

With their innovative and top selling product, the PFL N95 mask, currently meets both WHO and CDC protection levels in order to project individuals from the spreads of the influenza virus from individuals suffering the swine flu symptoms. Alpha Pro Tech share price has increased 250% since April 2009. More to come?

With their best seller Quidel Influenza Test, Quidel Corp. share price has increased over 80% since April 2009. Recognized as one of the best distributors of the top pharmaceutical companies, Quidel Corp. is looking to emerge as a leading player in the early detection of one of the fastest growing epidemics, the swine flu.

Inovio has two flu vaccines at late stages of the product pipeline. Their VGX-3400 and its universal influenza vaccine have also shown positive results during development and trial stages. However, other companies like AVI BioPharma (AVII) and Antigenics (AGEN) might win the race for the first swine flu vaccine

CelSci’s preclinical studies on its Ligand Epitope Antigen Presentation System (LEAPS) have demonstrated that vaccines using this system have the potential to induce protection against the swine flu. Companies like GlazoSmithKline (GSK), AstraZeneca (AZN) and AVI Biopharma (AVII) are also developing alternatives for the swine flu vaccine and cures for the H1N1 virus.

With a micro-injection influenza vaccine currently in phase II of development, Sanofi Adventis has the capability to develop the first swine flu vaccine. To supply the new swine flu virus at a global scale, companies like Sanofi Aventis may join efforts with other top pharmaceutical companies like AVI Biopharma (AVII), Pure Bioscience (PURE), Roche (RHHBY) and Antigenics (AGEN).

AstraZeneca’s swine flu research is continuing to combat the mutating forms of the swine flu virus. AstraZeneca’s continuing efforts to produce and distribute the first swine flu vaccine may force it to join venture with top biotech companies participating in the swine flu research. Swine stocks to watch: AVI Biopharma (AVII), Quidel Corporation (QDEL), Novavax (NVAX), BioCryst Pharmaceuticals (BCRX) and Dynavax Technologies (DVAX).

Baxter International completed the production of its first commercial batches of CELVAPAN swine flu vaccine in late July and is discussing plans for distribution with national health authorities, subject to obtaining appropriate authorizations. Due to the global scale of the swine flu pandemic, Baxter has partnered with top pharmaceutical companies to enhance their potential product offerings.

The most viable choices for investors are pharmaceutical companies with approved registration for H1N1 virus research that have vaccines with several phases into clinical trials. Top pharmaceutical companies and biotech companies with the largest distribution networks participating in the swine flu vaccine research and production include…