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Hallie Cope, Speaker at Immunology Conferences
Ipsos, United States
Title : Continued COVID-19 Vaccine Uncertainty in the United States in the Post-Pandemic Era


The production, distribution and administration of the COVID-19 vaccines was pivotal in changing the course of the pandemic; however, relative uptake of the vaccines varied across regions.

The Ipsos Global Core Vaccines Study is a multi-country, multi-centre, online, consumer review survey, conducted in November 2023. The survey aimed to track perceptions around vaccination and investigate the factors contributing to COVID-19 vaccine uptake, particularly focusing on US consumers aged 18-74 (2,002 sampled), in comparison to EU4 & UK consumers aged 16-74 (7,511 sampled).

The data showed a higher rate of non-vaccination for COVID-19 among the US cohort compared to the EU4 & UK (25% vs 10%), since vaccines became available. Interestingly, more of the EU4 & UK consumers have not received a flu vaccine in the last 5 years than in the US (48% vs 30%). This suggests a more specific hesitancy towards the COVID-19 vaccine in the US. Further investigation revealed a greater proportion of the US consumers cited concerns about long-term side effects (46% vs 39%), mistrust of the vaccine technology used (35% vs 17%), and a desire for further efficacy and safety data (15% vs 10%) as barriers to vaccination, vs. the EU4 & UK cohort. Additionally, the US consumers were more likely than their EU4 & UK counterparts to rely on family and friends (17% vs 11%), social media (13% vs 8%) and online information from pharmaceutical companies (14% vs 9%) for COVID-19 vaccine-related information, while being less likely to seek advice from their family doctor or healthcare provider (40% vs 47%).

The higher rate of COVID-19 vaccine hesitancy in the US sample compared to the EU4 & UK, in this study, appears to be influenced by a range of factors, including concerns about side-effects and vaccine technology, and the reliance on less formal and regulated information sources. This may result in a potentially greater opportunity for consumers to be misinformed or uninformed and greater inaction towards necessary routine vaccination in the future as COVID-19 vaccines are continually updated with the emergence of new variants. The US consumers surveyed highlighted a need for additional information on safety and efficacy and suggested willingness to consult reputable sources. This highlights the importance of targeted public health messaging and trust- building strategies to address these concerns and improve vaccine uptake. Further analysis is warranted to understand the deeper concerns of the consumer and what may drive behavioural change towards vaccination.


Hallie is the Director of Ipsos Syndicated Healthcare’s Global Vaccines studies. She has expertise in COVID-19, RSV, flu, pneumonia, and other vaccine types. She has ~15 years of experience in various healthcare sectors including market research in Pharma and MedTech global industries, as well as healthcare delivery within large hospital systems. Hallie is experienced in study design, data analysis, reporting insights, and providing recommendations to clients.