HIV Epidemiology and Prevention Strategies

The global HIV epidemic remains a major public health challenge, with marked regional variation in incidence and prevalence. Sub-Saharan Africa continues to bear the highest burden, while concentrated epidemics persist among key populations such as people who inject drugs, sex workers and their partners, and men who have sex with men. Epidemiological trends are shaped by social determinants, including poverty, stigma, disrupted health services during conflict or displacement, and barriers to testing and care. Advances in biomedical prevention have transformed the landscape: widespread antiretroviral therapy (ART) has not only improved survival but also reduced transmission through viral suppression (U=U). Pre-exposure prophylaxis (PrEP) offers additional protection for high-risk individuals. Behavioural interventions—condom promotion, harm-reduction programmes and education—remain vital, particularly when integrated with structural measures that address legal and societal obstacles. Ongoing research seeks an effective vaccine and explores novel approaches such as long-acting injectable agents. Despite substantial progress in reducing new infections and HIV-related mortality, achieving epidemic control will require tailored strategies that combine biomedical, behavioural and structural interventions in diverse settings.

Research from Nature Portfolio

No recent Nature Portfolio content available.

HIV Epidemiology and Prevention Strategies publication trend

The graph below shows the total number of articles in hiv epidemiology and prevention strategies across all publications each year (not limited to Nature Index journals).

Technical terms

Incidence: The number of new HIV infections occurring in a specified population over a defined time period.

Prevalence: The proportion of a population living with HIV at a given point in time.

Key populations: Groups with higher HIV risk due to specific behaviours or structural barriers, including people who inject drugs, sex workers and men who have sex with men.

Antiretroviral therapy (ART): Combination medication regimens used to suppress HIV replication and improve immune function.

Pre-exposure prophylaxis (PrEP): Preventive use of antiretroviral drugs by HIV-negative individuals to reduce the risk of infection.

Harm reduction: Strategies that minimise health risks associated with drug use, such as needle-and-syringe programmes and opioid substitution therapy.

References

1. Will the Russian war in Ukraine unleash larger epidemics of HIV, TB and associated conditions and diseases in Ukraine?. Harm Reduction Journal (2023).
2. HIV incidence and associated risk factors in female spouses of men who inject drugs in Pakistan. Harm Reduction Journal (2021).