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Leigh Johnson

@leighjohnsoncpt.bsky.social
39 followers 16 following 8 posts

Epidemiologist and science geek

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Leigh Johnson @leighjohnsoncpt.bsky.social · 18/08/2026
What should South Africa prioritize if it wants to reduce tuberculosis over the next decade? Our latest study shows the importance of increasing testing rates in people seeking treatment for TB symptoms: www.tandfonline.com/doi/full/10....
tandfonline.com
Towards ending tuberculosis in South Africa: an uncertainty analysis of the programmes and factors most critical to future declines
The WHO End Tuberculosis (TB) strategy targets 80% and 90% reductions in TB incidence and mortality, respectively, between 2015 and 2030.To assess which policy-changeable and external factors are m...
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Leigh Johnson @leighjohnsoncpt.bsky.social · 21/01/2026
Haroon Moolla's new study shows how the transition to dolutegravir HIV treatment in South Africa has had a profound impact - and why treatment interruptions threaten to reverse these gains: onlinelibrary.wiley.com/doi/10.1002/...
onlinelibrary.wiley.com
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Leigh Johnson @leighjohnsoncpt.bsky.social · 19/12/2025
South Africa has made much progress in reducing poverty and income inequality over the last 30 years. But what does this mean for HIV, STIs and teenage pregnancy? Our new study assesses this: dx.plos.org/10.1371/jour...
dx.plos.org
Evaluation of economic strengthening in South Africa and its impact on HIV, sexually transmitted infections, and teenage births: A modelling study
Using a modelling framework, Leigh Johnson and colleagues predict limited effects of economic strengthening interventions that aim to reduce HIV, sexually transmitted infections and teenage births in ...
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Leigh Johnson @leighjohnsoncpt.bsky.social · 06/11/2025
The idea that being gay is "un-African" is deeply flawed. In our latest study we analyse data on same-sex unions in South Africa to prove the point: link.springer.com/10.1007/s111...
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Leigh Johnson @leighjohnsoncpt.bsky.social · 14/10/2025
Haroon Moolla's new review shows why even very short interruptions in antiretroviral treatment are bad for immune function: journals.lww.com/jaids/abstra...
journals.lww.com
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Leigh Johnson @leighjohnsoncpt.bsky.social · 23/04/2025
Our new preprint provides more detail on previously reported impacts of HIV funding cuts: www.medrxiv.org/content/10.1...
medrxiv.org
The cost of the plunge: The impact and cost of a cessation of PEPFAR-supported services in South Africa
ABSTRACT Background Globally, shifts in United States foreign aid policy have put HIV funding under duress. South Africa is unique in the region because its HIV programme is largely domestically funde...
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Leigh Johnson @leighjohnsoncpt.bsky.social · 11/04/2025
Assessing the impact of HIV funding cuts in South Africa: groundup.org.za/article/us-f...
groundup.org.za
US funding cuts could cause over 150,000 extra HIV infections in SA by 2028
Experts say this can be avoided if the South African government covers some of the defunded services
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Leigh Johnson @leighjohnsoncpt.bsky.social · 27/01/2025
Our new study assesses the importance of STI testing in pregnancy in South Africa: onlinelibrary.wiley.com/doi/10.1002/...
onlinelibrary.wiley.com
<em>Journal of the International AIDS Society</em> | IAS HIV Research Journal | Wiley Online Library
Introduction Sexually transmitted infections (STIs) in pregnancy are associated with an increased risk of vertical HIV transmission and adverse pregnancy and birth outcomes. In South Africa, syndrom...
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Reposted by Leigh Johnson
IeDEA @iedeaglobal.bsky.social · 13/11/2024
FIRST POST! Since WHO guidelines shifted to #HIV viral load for monitoring treatment, CD4 testing has plummeted. A new IeDEA paper - led by Renee de Waal and Reshma Kassanjee at Univ of Cape Town and IeDEA Southern Africa - shows by just how much... In CID: academic.oup.com/cid/advance-...
academic.oup.com
Global trends in CD4 count measurement and distribution at first antiretroviral treatment initiation
AbstractBackground. While people with HIV (PWH) start antiretroviral treatment (ART) regardless of CD4 count, CD4 measurement remains crucial for detecting
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