Gene flow analysis reveals that the genomes of most sub-Saharan populations are the result of recent historical admixture events.

Blood donor serosurveillance in eight of Brazil’s most populous cities reveals extensive variation of SARS-CoV-2 attack rate across cities, age, and sex groups in December 2020 and increased intrinsic severity of the Gamma variant of concern.

Combined analyses of publicly available population-level variant data and detailed individual-level clinical data can be used to quantify the clinical impact of new SARS-CoV-2 variants in different settings.

Lower malaria prevalence in females does not appear to be due to lower rates of infection but rather due to faster clearance of asymptomatic infections.

Pathogen natural history, epidemiological knowledge, human behavior and epidemic progression determine whether symptom screening and questionnaires are effective barriers to geographic spread of infection by travelers.

SARS-CoV-2 can spread efficiently within care homes causing outbreaks among residents, who are at increased risk of severe disease, emphasising the importance of stringent infection control in this population.

Plasmodium falciparum kelch13 mutations that cause artemisinin resistant malaria in Southeast Asia show markedly different patterns of evolutionary selection in Africa.

In large vaccine trials conducted in dengue-endemic Asia and Latin America, the CYD-TDV tetravalent dengue vaccine shows limited variation in intra-serotype efficacy in the target population for vaccination (>9 years).

Canadian COVID-19 travel restrictions imposed in March 2020 greatly reduced SARS-CoV-2 importations, but were insufficient to prevent new sublineages of similar transmissibility from being introduced and replacing early sublineages.

Genomic analysis of initial SARS-CoV-2 waves in Kenya revealed Mombasa City as a key gateway for variants entering Coastal Kenya with onward inter-county transmission highlighting significance of surveillance in major cities for early warning of lineages entering local populations.