From Infectious Disease Special Addition online…
“HIV continues to disproportionately affect gay and bisexual men, even though new HIV infections declined among this population during the last decade,” said Stephen M. Perez, PhD, a nurse epidemiologist in the CDC‘s Division of HIV Prevention and lead author of the MMWR article.

“Also, progress in reducing new HIV infections among gay and bisexual men has not been equal—with factors like stigma, racism, discrimination, homophobia and others contributing to an unequal reach of HIV prevention and treatment and continued disparities.”
During 2018-2019, the CDC identified a number of concerning HIV clusters among MSM. By December 2021, 38 clusters that had been initially identified during 2018-2019 grew to include more than 25 people.
“The presence of a cluster suggests that HIV prevention and treatment have failed to reach a particular community, and that HIV is transmitting rapidly within that community,” Dr. Perez told Infectious Disease Special Edition.