Africa is far off track in reducing new HIV infections among
children and young people and is unlikely to reduce new infections in young people
substantially before 2030 due to an anticipated doubling of the adolescent
population, according to findings from a UNICEF modelling exercise presented on
Thursday at the 22nd International AIDS Conference (AIDS 2018) in Amsterdam.
The study looked at what will happen as the population of
children and adolescents grows in sub-Saharan Africa over the next few decades.
While populations age in other parts of the world, notably in Europe and Asia,
Africa will experience a 'youth bulge'.
The population of adolescents and young people aged 15 to 24
living in sub-Saharan Africa will almost double by 2050, whereas it will decline
or remain stable in every other region of the world. HIV incidence among young
women remains high and incidence is estimated to have declined by only 3% a
year among young people since 2010. As the population of young people grows,
the total number of young people living with HIV will also grow unless there is
a greater and more sustained reduction in HIV incidence among young people.
To examine the impact of this demographic transition on HIV
in young people, UNICEF took data from UNAIDS HIV estimates, UN population
projections and other validated sources to develop projections of HIV incidence
and prevalence until 2050 for 141 countries, including 46 countries in
sub-Saharan Africa.
The findings were presented by Aleya Khalifa of UNICEF.
The model compared outcomes for two trends: the current
trend in HIV incidence and antiretroviral coverage, and what might happen if the
Fast Track goals for reducing HIV incidence and treatment coverage by 2020 (81%
coverage) and 2030 (90% coverage) are achieved. The model also compared trends
in treatment coverage for prevention of vertical (mother-to-child) transmission, based on the current trend or achievement of the Fast Track
targets by 2020 (75% coverage) and 2030 (95% coverage).
The study found that if current trends prevail, although the
number of new infections in children under five years of age will fall by half
by 2030, to around 140,000 per year, new infections in adolescents
(aged 15 to 19) will not be halved until 2050 and will still be running at a
rate of approximately 200,000 per year in 2030.
But the study also found that countries are far from
reaching the 2020 targets, let alone the 2030 targets, implying that the 'current trend' scenario is highly likely to play out unless major efforts are
made to reach adolescents and prevent new infections in children.
Based on current trends, new infections in children will
fall by only 42% by 2020, rather than the 95% goal set by international
agreements.
The model finds that 1.9 million children and adolescents
will be living with HIV by 2030, falling to 1 million by 2050.
Similarly, new infections in adolescent girls aged 15 to 19
will fall by only 28%, while infections in boys will fall by only 25%, far
short of the 75% reduction envisaged in the Three Frees framework for an
AIDS-Free Generation.
Aleya Khalifa said these projections “really should serve as
a warning.”
The study also found that the impact of achieving Fast Track
goals for treatment coverage would be most pronounced for new infections in
adolescents. Whereas on the current trend, new infections among adolescent
girls would fall by 42% by 2030, new infections would fall by 83% by 2030 if
90% treatment coverage could be achieved. A similar reduction in new infections
could be achieved among adolescent boys.
Although the study found that, overall, new HIV infections
will decline by 70% in Eastern and Southern Africa by 2050, no country in sub-Saharan
Africa can expect to reduce new infections by 95% among adolescents and young
people by 2030. Based on current trends and levels of prevention activities,
UNICEF estimates that almost 10 million adolescents and young people will be
infected with HIV between 2017 and 2050. Two-thirds of these infections will
occur in young women.
The study estimates that only Botswana, Mozambique,
Swaziland, Uganda and Zimbabwe will be able to achieve a 95% reduction in new
infections among adolescents and young people by 2050. The share of new
infections occurring in Western and Central Africa will grow, partly because of
an especially fast increase in the child population in the region, but also
because of slow progress towards the 2020 targets.