Fig. 4

Distribution of the metagenomic antibiotic resistomes that were carried by human virulent potential antibiotic-resistant bacteria (HVF-PARB) in the hospital-specific PM_2.5. The annotated numbers on the inner layer of the circos plot represent the abundance (coverage/size) of ARGs in the hospital samples, of which the MGE-associated ones are depicted in red. The bacterial taxa of the antibiotic resistome are annotated to the phylum level, with those labeled in red indicating those detected in summer