Workplace vaccination programs face severe disruptions across Ireland after manufacturing delays leave private healthcare providers scrambling for winter flu shots. Drug manufacturer Sanofi announced on Friday that it expects additional doses for the private market, offering relief after the Irish health service and independent clinics reported tight supplies.
Manufacturing Bottlenecks Hit Private Influenza Vaccine Supplies
The influenza vaccine manufacturing industry faces particular challenge this season. Sanofi stated that two external factors disrupted production: three strain changes compared to last year’s composition, and the late identification of the B strain candidate. This delayed the shipment of the reference strain to manufacturers globally. As a result, companies have had to optimize production volumes and streamline timelines. Several private firms in Ireland have already postponed staff vaccination clinics due to the resulting shortages.
Supplier Responses Highlight Diverging Delivery Schedules
Suppliers have adopted different strategies to manage the shortfall. Sanofi stated on Friday that extra doses will cover private market supply, noting, “we do not anticipate any shortages for either the HSE national immunisation programme or private healthcare providers.” In contrast, supplier Viatris reported earlier in the week that it would not supply vaccines to the private market this year based on a revised manufacturing and delivery schedule. Viatris informed the Irish health authority and customers to give them time to secure alternative supplies, while confirming that deliveries of the Influvac® influenza vaccine for the national program have already begun.
Prioritizing National Immunisation Programmes
Both major drug companies are prioritizing supplies for the Health Service Executive (HSE) national immunisation programme. This targeted rollout for at-risk groups is scheduled to begin on October 8. Viatris noted that a portion of its national program deliveries will arrive later in December due to anticipated delays. Abbott, a third-party manufacturer for Viatris, confirmed that production was impacted by the simultaneous update of all three influenza virus strains recommended by the World Health Organization (WHO) for the 2026-2027 season, alongside delays in critical manufacturing materials.
Frequently Asked Questions
Will workplace flu vaccination clinics be cancelled?
However, updated supply forecasts from manufacturers like Sanofi may help ease these delays for private providers.
When does the national immunisation programme start?
The HSE national immunisation programme for at-risk groups begins on October 8, with both major suppliers prioritizing these public health doses.
Why are flu vaccines delayed this season?
Manufacturers point to three major strain changes compared to last year, the late identification of the B strain candidate, and delays in obtaining critical materials required for strain standardization.
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