Cited by 454Influenza Virus Research StudiesSARS-CoV-2 and COVID-19 ResearchBacterial Infections and Vaccines

mRNA vaccines against H10N8 and H7N9 influenza viruses of pandemic potential are immunogenic and well tolerated in healthy adults in phase 1 randomized clinical trials

Open access
Feldman, Robert A., Fuhr, Rainard, Smolenov, Igor, (Mick) Ribeiro, Amilcar, Panther, Lori, Watson, Mike, Senn, Joseph J., Smith, Mike +6 more·2019·Vaccine

Abstract

BACKGROUND: We evaluated safety and immunogenicity of the first mRNA vaccines against potentially pandemic avian H10N8 and H7N9 influenza viruses. METHODS: Two randomized, placebo-controlled, double-blind, phase 1 clinical trials enrolled participants between December 2015 and August 2017 at single centers in Germany (H10N8) and USA (H7N9). Healthy adults (ages 18-64 years for H10N8 study; 18-49 years for H7N9 study) participated. Participants received vaccine or placebo in a 2-dose vaccination series 3 weeks apart. H10N8 intramuscular (IM) dose levels of 25, 50, 75, 100, and 400 µg and intradermal dose levels of 25 and 50 µg were evaluated. H7N9 IM 10-, 25-, and 50-µg dose levels were evaluated; 2-dose series 6 months apart was also evaluated. Primary endpoints were safety (adverse events) and tolerability. Secondary immunogenicity outcomes included humoral (hemagglutination inhibition [HAI], microneutralization [MN] assays) and cell-mediated responses (ELISPOT assay). RESULTS: H10N8 and H7N9 mRNA IM vaccines demonstrated favorable safety and reactogenicity profiles. No vaccine-related serious adverse event was reported. For H10N8 (N = 201), 100-µg IM dose induced HAI titers ≥ 1:40 in 100% and MN titers ≥ 1:20 in 87.0% of participants. The 25-µg intradermal dose induced HAI titers > 1:40 in 64.7% of participants compared to 34.5% of participants receiving the IM dose. For H7N9 (N = 156), IM doses of 10, 25, and 50 µg achieved HAI titers ≥ 1:40 in 36.0%, 96.3%, and 89.7% of participants, respectively. MN titers ≥ 1:20 were achieved by 100% in the 10- and 25-µg groups and 96.6% in the 50-µg group. Seroconversion rates were 78.3% (HAI) and 87.0% (MN) for H10N8 (100 µg IM) and 96.3% (HAI) and 100% (MN) in H7N9 (50 µg). Significant cell-mediated responses were not detected in either study. CONCLUSIONS: The first mRNA vaccines against H10N8 and H7N9 influenza viruses were well tolerated and elicited robust humoral immune responses. ClinicalTrials.gov NCT03076385 and NCT03345043.

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Crossref · 10.1016/j.vaccine.2019.04.074

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  • Prior studies showed that solicited systemic adverse events tended to be more frequent and more severe with higher doses and after the second vaccination.

    “Those studies showed that solicited systemic adverse events tended to be more frequent and more severe with higher doses and after the second vaccination.”

    From An mRNA Vaccine against SARS-CoV-2 — Preliminary Report (2020) · cites this paper as [11]

    The H10N8 Results (§3.2.1; page unavailable) report that fever increased with dose and was more frequent after the second dose in the 100-mg group. The H7N9 Results (§3.2.2; page unavailable) report that 11 of 12 severe solicited events occurred in the highest-dose group, but explicitly state that, except for fever in that group, solicited-event frequency did not increase after the second vaccination. The source therefore supports a dose-related pattern and limited post-second-dose increases, not a general increase in the frequency and severity of systemic events after the second vaccination. (LLM, conf=0.88)

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  • The descriptive safety profile of mRNA-1273 is similar to that of avian influenza mRNA vaccines and consistent with an interim report of a Covid-19 mRNA vaccine encoding the S receptor-binding domain.

    “This descriptive safety profile is similar to that described in a report of two trials of avian influenza mRNA vaccines (influenza A/H10N8 and influenza A/H7N9) that were manufactured by Moderna with the use of an earlier lipid nanoparticle capsule formulation11 and is consistent with an interim report of a phase 1–2 evaluation of a Covid-19 mRNA vaccine encoding the S receptor-binding domain.6”

    From An mRNA Vaccine against SARS-CoV-2 — Preliminary Report (2020) · cites this paper as [11]

  • Two RNA vaccine studies encoding other antigens did not observe durable antibody titers in humans or non-human primates.

    “Two RNA vaccine studies encoding other antigens did not see durable antibody titers in humans or non-human primates”

    From Adaptive immunity to SARS-CoV-2 and COVID-19 (2021) · cites this paper as Feldman et al., 2019

  • The mRNA-1440 vaccine against H10N8 and the mRNA-1851 vaccine against H7N9 influenza viruses were well tolerated and elicited robust humoral immune responses when tested separately.

    “Current clinical trials showed that the mRNA-1440 vaccine against H10N8 and the mRNA-1851 vaccine against H7N9 influenza viruses were well tolerated and elicited robust humoral immune responses when tested separately (Table 4).360”

    From Advances in COVID-19 mRNA vaccine development (2022) · cites this paper as [360]

  • Adverse effects of the Moderna influenza candidates were limited to pain at the injection site, redness, muscle pain, joint pain, headache, fatigue and chills/common-cold-like symptoms, indicating that the vaccine is safe and well tolerated.

    “Adverse effects were limited to pain at the injection site, redness, muscle pain, joint pain, headache, fatigue and chills/common-cold-like symptoms, indicating that the vaccine is safe and well tolerated150.”

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Authors
Feldman, R. A., Fuhr, R., Smolenov, I., (Mick) Ribeiro, A., Panther, L., Watson, M., Senn, J. J., Smith, M., Almarsson, Ӧ., Pujar, H. S., Laska, M. E., Thompson, J., Zaks, T., & Ciaramella, G.
Affiliations
Moderna Therapeutics (United States) (US)
Venue
Vaccine
Publisher
Elsevier BV
Published
2019-05
Volume
37
Issue
25
Pages
3326-3334
ISSN
0264-410X (ISSN-L)
OpenAlex
W2944588091
Cited by
454
References
36
Citations by year
2026: 27 · 2025: 41 · 2024: 66 · 2023: 60 · 2022: 87 · 2021: 114 · 2020: 53 · 2019: 6
FWCI
49.46
Type
journal article
Language
en
Open access
Locations
  • Vaccine (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
Funders
Moderna
Topics
  • Health Sciences › Medicine › Epidemiology › Influenza Virus Research Studies
  • Health Sciences › Medicine › Infectious Diseases › SARS-CoV-2 and COVID-19 Research
  • Life Sciences › Immunology and Microbiology › Microbiology › Bacterial Infections and Vaccines
Keywords
mRNA vaccines, H7N9 influenza virus, pandemic influenza preparedness, vaccine safety, vaccine immunogenicity, intradermal vaccination, intramuscular vaccination, dose escalation, hemagglutination inhibition, microneutralization, cell-mediated immunity, healthy adults, reactogenicity, healthy volunteers, vaccine tolerability
MeSH terms
Immunogenicity, Vaccine, Adolescent, Adult, Antibodies, Viral, Dose-Response Relationship, Drug, Double-Blind Method, Female, Humans, Influenza, Human, Influenza Vaccines, Male, Middle Aged, RNA, Viral, Young Adult, Healthy Volunteers, Influenza A Virus, H7N9 Subtype, Influenza A Virus, H10N8 Subtype

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