Research on long COVID in children is limited, and reported prevalences range widely, from less than 1% to 70%. And while it's a relatively new condition in an evolving field, experts say it could be better defined and measured through well-designed longitudinal studies that take children's unique presentations into account.
Moderna on Wednesday said its combination vaccine targeting Covid and the flu will move to a final stage trial after showing positive results in an earlier study.
The biotech company is hoping its shot, mRNA-1083, can win approval from regulators in 2025.
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