A Study About Modified RNA Vaccines Against Influenza in Healthy Adults

Local reactions included pain at the injection site, redness and swelling and were recorded by participants in the electronic dairy (e-diary) or by investigators in case report form (CRF) after vaccination. All local reactions were graded based on center for biologics evaluation and research (CBER) toxicity guidelines as Grade 1 (Mild), Grade 2 (Moderate), Grade 3 (Severe) and Grade 4 (potentially life-threatening). In this outcome measure, data is reported as percentage of participants with any local reaction of any grade.

Local reactions included pain at the injection site, redness and swelling and were recorded by participants in the e-diary or by investigators in CRF after vaccination. All local reactions were graded based on CBER toxicity guidelines as Grade 1 (Mild), Grade 2 (Moderate), Grade 3 (Severe) and Grade 4 (potentially life-threatening). In this outcome measure, data is reported as percentage of participants with any local reaction of any grade.

Local reactions included pain at the injection site, redness and swelling and were recorded by participants in the e-diary or by investigators in CRF after vaccination. All local reactions were graded based on CBER toxicity guidelines as Grade 1 (Mild), Grade 2 (Moderate), Grade 3 (Severe) and Grade 4 (potentially life-threatening). In this outcome measure, data is reported as percentage of participants with any local reaction of any grade.

Systemic events (fever, vomiting, diarrhea, headache, fatigue, chills, new or worsened muscle pain and joint pain) were recorded by participants in the e-diary or by investigators in CRF after vaccination. All systemic events were graded based on CBER toxicity guidelines as Grade 1 (Mild), Grade 2 (Moderate), Grade 3 (Severe) and Grade 4 (potentially life-threatening). In this outcome measure, data is reported as percentage of participants with any systemic events of any grade.

Systemic events (fever, vomiting, diarrhea, headache, fatigue, chills, new or worsened muscle pain and joint pain) were recorded by participants in the e-diary or by investigators in CRF after vaccination. All systemic events were graded based on CBER toxicity guidelines as Grade 1 (Mild), Grade 2 (Moderate), Grade 3 (Severe) and Grade 4 (potentially life-threatening). In this outcome measure, data is reported as percentage of participants with any systemic events of any grade.

Systemic events (fever, vomiting, diarrhea, headache, fatigue, chills, new or worsened muscle pain and joint pain) were recorded by participants in the e-diary or by investigators in CRF after vaccination. All systemic events were graded based on CBER toxicity guidelines as Grade 1 (Mild), Grade 2 (Moderate), Grade 3 (Severe) and Grade 4 (potentially life-threatening). In this outcome measure, data is reported as percentage of participants with any systemic events of any grade.

An AE was any untoward medical occurrence in a clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention. Only AEs collected by non-systematic assessment (excluding local reactions and systematic events) were included in this outcome measure.

An AE was any untoward medical occurrence in a clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention. Only AEs collected by non-systematic assessment (excluding local reactions and systematic events) were included in this outcome measure.

An AE was any untoward medical occurrence in a clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention. Only AEs collected by non-systematic assessment (excluding local reactions and systematic events) were included in this outcome measure.

An SAE was defined as any untoward medical occurrence that, at any dose, met one or more of the following criteria: resulted in death, was life-threatening, required inpatient hospitalization or prolongation of existing hospitalization, resulted in persistent or significant disability/incapacity, was a congenital anomaly/birth defect, any other pre-specified criteria in protocol of the study or other important medical event judged by the investigator.

An SAE was defined as any untoward medical occurrence that, at any dose, met one or more of the following criteria: resulted in death, was life-threatening, required inpatient hospitalization or prolongation of existing hospitalization, resulted in persistent or significant disability/incapacity, was a congenital anomaly/birth defect, any other pre-specified criteria in protocol of the study or other important medical event judged by the investigator.

An SAE was defined as any untoward medical occurrence that, at any dose, met one or more of the following criteria: resulted in death, was life-threatening, required inpatient hospitalization or prolongation of existing hospitalization, resulted in persistent or significant disability/incapacity, was a congenital anomaly/birth defect, any other pre-specified criteria in protocol of the study or other important medical event judged by the investigator.

An MAE was defined as a non-serious AE that resulted in an evaluation at a medical facility.

An MAE was defined as a non-serious AE that resulted in an evaluation at a medical facility.

An MAE was defined as a non-serious AE that resulted in an evaluation at a medical facility.

An NDCMC was defined as a disease or medical condition, not previously identified, that was expected to be persistent or otherwise long-lasting in its effects (e.g., asthma).

An NDCMC was defined as a disease or medical condition, not previously identified, that was expected to be persistent or otherwise long-lasting in its effects (e.g., asthma).

An NDCMC was defined as a disease or medical condition, not previously identified, that was expected to be persistent or otherwise long-lasting in its effects (e.g., asthma).

GMTs and the corresponding 2-sided 95% confidence intervals (CIs) were calculated by exponentiating the mean logarithm of the titers and the corresponding CIs (based on the Student t distribution).

GMFR was defined as the geometric mean of the fold rise in the assay results from before vaccination to a specified time point after vaccination.

Seroconversion was defined as an HAI titer <1:10 prior to vaccination and >=1:40 at the time point of interest, or an HAI titer of >=1:10 prior to vaccination with at least a 4-fold rise at the time point of interest.

This measure is for percentage of participants achieving HAI titers >=1:40 for each strain.

This measure is for percentage of participants achieving HAI titers >=1:40 for each strain.