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Global dynamics of a fractional-order COVID-19 model with modified Crowley–Martin incidence rate and optimal vaccination control using real data analysis

Crossref DOI link: https://doi.org/10.1007/s40435-026-02154-6

Published Online: 2026-06-15

Published Print: 2026-07

Update policy: https://doi.org/10.1007/springer_crossmark_policy

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