Flu Shot Recommendations for Travelers: Timing and Universal Vaccines

Travelers should consider a second flu shot due to waning immunity from the initial shot and the increased risk of exposure in crowded travel settings. Protection from a flu shot decreases after three to four months, making a booster beneficial for those traveling during peak flu season in the northern hemisphere. High-risk environments include cruises, group tours, and religious pilgrimages. The traditional approach to flu vaccination involves annual shots tailored to predicted strains, but companies like Osivax are developing universal vaccines that target less mutable viral components. Osivax's OVX836 has shown promising results in Phase 2a trials, demonstrating a strong safety profile and robust immune response when co-administered with seasonal flu vaccines. This vaccine targets the nucleoprotein (NP), a highly conserved internal antigen, offering a broader immune response. This matters because it could lead to more effective protection against various flu strains, reducing the impact of strain mismatches. The co-administration of OVX836 with seasonal vaccines could provide synergistic effects, enhancing overall efficacy.

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If you are traveling to the northern hemisphere during their flu season (October to May) and your last flu shot was more than three to four months ago, a second shot can provide optimal protection.

Flu shots are available at local pharmacies, GP clinics, and sometimes through workplaces. In Australia, they typically cost around A$25.

A universal flu vaccine targets less mutable parts of the virus, like the nucleoprotein (NP), providing broader protection against different strains. Osivax's OVX836 is an example of a universal flu vaccine candidate.

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