Research Daily Summary: What Happened on October 21, 2026

Measles burden rose after 2020

A Global Burden of Disease analysis estimated 15.6 million measles cases and 118,000 deaths worldwide in 2023.1 Compared with 2019, cases were 40% higher and deaths 12% higher, after both measures declined from 1990 through 2019.1

The study tracked children younger than five across 204 countries and territories from 1990 to 2023.1 Sub-Saharan Africa and South Asia continued to have the greatest burden.1

Coverage for the first measles-containing vaccine dose fell from 83.6% in 2019 to 81.0% in 2023, while second-dose coverage reached 71.4%.1 Multiple regions remained below the 90% Immunization Agenda 2030 target.1 The study authors called for restoring routine vaccination, closing immunity gaps and improving outbreak readiness.1

Pertussis rebounded from pandemic-period lows

A global analysis estimated 18.9 million pertussis cases and 115,000 deaths in 2023.2 From 2020 to 2023, estimated incidence rose 102.6% and mortality rose 66.1%.2

The authors estimated that the 2023 burden was broadly near pre-pandemic levels, rather than a global surge beyond those levels.2 From 1990 to 2023, age-standardized incidence fell 41.6% and mortality fell 61.2%.2

Infants younger than six months had the highest population-adjusted mortality risk.2 Sub-Saharan Africa accounted for an estimated 63–65% of global deaths and disability-adjusted life years in 2023.2 The authors said the findings support vaccinating infants on schedule, maternal immunization when recommended and feasible, and stronger surveillance in highly susceptible regions.2

DynaVelo tested rescue targets in mouse B cells

Using single-cell multiomic data, DynaVelo predicted that altering Ctcf, Stat3 or Bcl6 could counter Arid1a loss in mouse germinal-center B cells.3 In double-heterozygous mice, all three targets rescued the dark-zone phenotype associated with heterozygous Arid1a loss.3

The model learned gene-expression dynamics alongside transcription-factor motif activity, patterns in DNA sequences that can indicate where regulatory proteins act.3 Analysis of mice with heterozygous Arid1a and Ctcf loss also supported the predicted shift toward wild-type cellular dynamics.3

Also worth knowing

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  In human cells, engineered recordanelles sampled up to 90% of endogenous messenger RNAs and preserved them for several days, retaining transient responses to synthetic inducers and interferon signaling.4

Also published

• Pushing the limits of life: mysterious microbe has record-breaking tiny genome BioTechniques
• The need for resilience in global vaccination programs Nature Medicine