Impact of COVID-19 Restrictions on Estimating Causal Effects: Fluoroquinolones and Tendon Rupture

• by Angel Y. S. Wong, Jeremy P. Brown, John Tazare, Marleen Bokern, Elizabeth Williamson, Jonathan Bartlett, Charlotte Warren-Gash, Ian Douglas

• October 15, 2026

Low prevalence of bacterial coinfection at hospital admission in COVID-19 and the role of procalcitonin as a rule-out biomarker

• by Nuria Ena, Javier García-Abellán, Christian Ledesma, Marta Fernández-González, Lidia García-Sánchez, Sergio Padilla, Mar Masiá, Félix Gutiérrez

• July 17, 2026

Same-Day COVID, Flu Vaccination Appears Safe

Study found no increased 90-day risk of serious adverse events with coadministration compared with vaccination alone.

• by Olivia Anderson

• July 8, 2026

• 2 min

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• July 16, 2026