Covid and flu vaccines protect you from getting those diseases.
See the scientific wording
Vaccination against SARS-CoV-2 (Covid-19) and influenza viruses provides protection against developing the respective diseases (Covid-19 and influenza) in vaccinated human populations. The magnitude of protection (absolute risk reduction, relative risk reduction), duration of protection, effect on severe outcomes (hospitalization, death), specific vaccine types, dosages, schedules, and target populations are not specified in the claim.
Very strong evidence
Mixed evidence3 high-quality studies support this claim.
What the research says
3 studies reviewedSupporting (3)
Safety and Efficacy of the BNT162b2 mRNA Covid-19 Vaccine through 6 Months
Randomized Controlled TrialHuman2021
The study shows the Covid vaccine strongly protects people from getting Covid. It doesn't test the flu vaccine, so we can't say anything about flu from this study alone.
Safety and Efficacy of the BNT162b2 mRNA Covid-19 Vaccine
Randomized Controlled TrialHuman2020
The study shows the Covid vaccine works very well to prevent Covid, but it doesn't look at flu vaccines at all, so it only backs up the Covid part of the claim.
Cohort StudyHuman2025
The study found that vaccinated people who still got COVID had weaker T-cell responses after their booster, suggesting that the vaccine's protection may depend on these responses. It doesn't test flu vaccines or directly measure how well vaccines prevent infection.
Contradicting (0)
No contradicting studies found yet
That doesn't mean it's settled — it just means no study has tested the opposite.
Quality-weighted scoring: we follow the GRADE framework — each study is rated High, Moderate, Low, or Very Low based on study design, methodology rigor, and risk of bias. A single high-quality RCT can outweigh several weaker observational studies.
Scores reflect study quality, not just count.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 3 supporting studies
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