This study analyzed data from 10,443 children and adolescents with COVID-19 in Japan and found that the Delta variant was associated with increased hospitalization rates.
To avoid confusion, it is important to distinguish this specific keyword from broader Japanese female subcultures and terms: japanese girls delta
One such paper is:
For more specific information or updated research, I recommend searching scientific databases like PubMed, Google Scholar, or ResearchGate. This study analyzed data from 10,443 children and
The term most frequently refers to the television series, which debuted around 2012. Genre: Adult/Hardcore entertainment. This study analyzed data from 10