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DTSTART:20241103T020000
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DESCRIPTION:Although there are effective strategies to control the HIV epi
 demic\, it remains a significant individual and public health challenge i
 n South Africa. HIV testing is the gateway to HIV treatment in those who 
 have acquired HIV and HIV prevention in those who tested HIV negative. Ex
 isting studies have suggested that HIV testing has a significant effect i
 n reducing HIV incidence. However\, these studies have not fully assessed
  spillover effects\, the effects of one’s HIV testing on HIV incidence am
 ong unexposed others. Assessing spillover can provide a more complete und
 erstanding of the impact of HIV testing. The data we used is from ANRS 12
 249 treatment as prevention (TasP) trial\, conducted in a rural region of
  South Africa from March 2012 to July 2016. We grouped participants by ho
 mesteads and assumed partial interference (i.e.\, one unit's outcome may 
 be affected by the exposures of other members within in same group\, but 
 not by exposures from units in other groups) limited to the homestead\, e
 stimated both the direct (i.e.\, the intervention effect under exposure v
 ersus no exposure while holding other factors constant) and spillover eff
 ects of altering the proportion of HIV testing in the homestead on subseq
 uent HIV incidence. Estimation was carried out with a marginal structured
  model fit with time-varying inverse probability weights. On average in t
 he study population\, there were fewer new HIV cases under HIV testing ex
 posure (i.e.\, direct effect) or higher proportion of HIV testing uptake 
 in an untreated individual’s homestead (i.e.\, spillover effect). Further
  research is needed to understand the underlying mechanisms.\n\nSpeaker:\
 nKe Zhang\n\nAdmission:\nFree\n\nFood:\nLunch: Boxed lunch will be provid
 ed for those who RSVP with vegan and vegetarian options available \n\nDet
 ails URL:\nhttps://medicine.yale.edu/event/cmips-seminar-ashley-buchanan-
 and-ke-zhang/\n
DTEND;TZID=America/New_York:20250917T130000
DTSTAMP:20260411T055203Z
DTSTART;TZID=America/New_York:20250917T120000
LOCATION:URL: https://yale.zoom.us/j/92076737861?from=addon
SEQUENCE:0
STATUS:Confirmed
SUMMARY:CMIPS Seminar
UID:b6737148-0886-45d3-a135-8734c38695ce
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