Evolving viral threats Chemical whispers hidden in the plant and microbiota kingdoms. Phage-host dynamics in space. Tree bark microbiota in climate-active gas cycling. Flipping the drug resistance switch. Panning for gold: incidentally sequenced DNA. Tick-borne viruses: discovery, clinical aspects, influencing factors and control. Oral-gut bacterial transport drives chronic liver disease. Gut microbiome control of HIV immunodeficiency. Keystone concept revisited: insights into microbial community dynamics and control Harnessing the microbiome for cancer therapy The gut microbiome in solid-organ and haematopoietic-stem-cell transplantation Climate change and antimicrobial resistance The paradox of immune systems conservation between prokaryotes and eukaryotes Predicting phage–host specificity How flaviviruses choose their mosquito Iron acquisition by amino acids under flow Varicella zoster virus and the central nervous system Probing the host cell exit strategy ofBabesia divergens Microbiota-neuroepithelial signalling across the gut-brain axis. Stopping Marburg virus in its tracks. Opposing forces. Microbial interactions lead to ecosystem function. Microbial secondary metabolites: advancements to accelerate discovery towards application. Norovirus replication, host interactions and vaccine advances. RNA evolution shapes SARS-CoV-2 success. A gut microbiome-restoring diet. Decoding pathogen evolution to curb antimicrobial resistance. Origin and function of beneficial bacterial symbioses in insects. Genetics, ecology and evolution of phage satellites.