Only 16% of 670 patients seen at Kamituga hospital in South Kivu were under the age of 15 years.
The test the US Centers for Disease Control and Prevention uses to identify clade I mpox cases is 'most likely not reliable' for detection of the substrain identified in the study, the authors say.
Another mpox study today showed that dose-sparing vaccine administration of the Jynneos vaccine appeared to have worked.
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Because not all viruses from mpox cases are sequenced, the findings likely underestimate the prevalence of the newly identified drug-resistant variant.
So far, more than 1,600 people have been vaccinated in some of the DRC's hot spots.
The DRC has reported more than 30,000 suspected and laboratory-confirmed mpox cases this year.
In other mpox developments, Africa CDC noted a worrying rise in Kinshasa and the WHO listed the first mpox test for emergency use.
The CDC reports just 2 new measles cases, raising the national total this year to 264.
The most common changes made were reducing the number of sexual partners, avoiding group sex, and avoiding sex-on-premises venues.
The pledge came with at least $500 million in outbreak support, along with a plan to help bolster the domestic mpox vaccine supply.
Also, the CDC recommends that anyone anticipating sexual activity in the DR Congo and other affected countries receive 2 doses of mpox vaccine.
Vaccine-generated mpox antibodies largely waned after 6 to 12 months.
About 500 people in high risk groups in DRC-border regions have been immunized so far.