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Population-level hybrid immunity depends substantially on vaccination coverage, including among those previously infected, and dried blood spot collection serves as a practicable biological surveillance platform for these immune responses.

Sepsis leads to lasting changes in the composition of the pre-existing memory CD8 T cell compartment leading to altered localization, changes in their transcriptional landscape and chromatin accessibility, differential function, and reduced capacity to control infection.

Cross-sectional serological data and mathematical models suggest the existence of long-term periodicity in human antibody responses arising from multiple exposures to influenza A(H3N2), providing insights into the interactions between exposure histories and future risks of infections.

Genomic analyses provide new insights into natural history and pathogenesis of cytomegalovirus infection and suggest new testable hypotheses that could be important for the design and implementation of new vaccines.

Widespread asymptomatic SARS-CoV2 infection affected nearly 100 million Indians by September 2020 with a subsequent decline in new cases, which may be attributable to increased population immunity, albeit seeing reduced neutralization activity at 6 months this respite may be temporary.

In years with colder ocean temperatures, fur seal pups receive more maternal care and have a better energy balance, clearing hookworm infection earlier, which increases their chances of survival.

Morphological and fitness defects imposed on amoebae hosts by Burkholderia symbionts demonstrates symbiont species-specific effects and provides evidence of host adaptation to naturally acquired symbionts.

Deleterious mutations slow down flu's antigenic evolution, make it more punctuated in nature, and reduce the virus's genetic diversity.

The currently recommended adult dose of tafenoquine is insufficient for radical cure in all adults.

A combination of eight serological surveys shows a decline in seroprevalence over a two-year period following the first reports of Zika transmission in Fiji and French Polynesia.