[Impacto de la pandemia de la COVID-19 en los sistemas de vigilancia epidemiologica de la infección por vih en España.]

Objective: The COVID-19 pandemic indirectly affected other communicable diseases, such as human immunodeficiency virus (HIV) infection. The aim of this paper was to evaluate the impact of the COVID-19 pandemic on the epidemiological surveillance of HIV through epidemiological indicators.

Methods: Data collected in the New HIV Diagnosis Information System (SINIVIH, acronym in Spanish) in the period 2013-2021 was analyzed. The epidemiological indicators analyzed were: 1) Reporting delay of new diagnoses; 2) Under diagnosis of cases, calculated per month of diagnosis and for each year of diagnosis; 3) Late diagnosis, cases diagnosed with less than 350 CD4 cell/mm³.

Results: Regarding the reporting delay of new diagnoses, in 2022 2,770 diagnoses were reported in 2020, 43.8% more than those reported in 2021 for that year. The cases diagnosed per month between 2016 and 2019 followed a constant trend. In 2020, a significant decrease in diagnoses was observed between March and May that was not recovered after correcting for reporting delay. When comparing the rates of cases diagnosed in 2013 with the successive years, a continuous decrease was interrupted in the last year of the study period. The percentage of cases with late diagnosis had remained stable in the study period (between 46% and 50%), and a decrease in this percentage was observed after correcting for reporting delay.

Conclusions: The epidemiological surveillance of HIV suffered a significant reporting delay. A decrease in cases diagnosed is confirmed, partly due to lockdown and lack of access to the health system. Changes on late diagnosis is not observed.