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The cyanobacterium Trichodesmium fixes nitrogen exclusively during the day to reduce glycogen ballast and remain buoyant in the surface ocean, where it occupies a specialized niche based on colony formation, high-light adaptation and mineral-dust utilization.
A combined analysis of SARS-CoV-2 viral load and whole-genome sequences from COVID-19 patients, including some who were previously vaccinated, reveals that vaccine breakthrough infections are more commonly associated with antibody-resistant SARS-CoV-2 variants than infections in unvaccinated individuals, and that symptomatic breakthrough infections may be as efficient in spreading COVID-19 as unvaccinated infections.