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Table 1 Risk and vulnerability factors affecting the component terms of R0 in HIV epidemiology among migrants

From: Restricted access to antiretroviral treatment for undocumented migrants: a bottle neck to control the HIV epidemic in the EU/EEA

Term Definition Factors affecting the term Intervention to reduce the term’s value
β Transmission efficiency Self-perceived risk Access to HIV information
Condom availability and use HIV prevention and risk reduction strategies
Sexual practices
Exposure to sexual violence
STI co-infections Access to STI care and treatment services
Detectable viral load ART provision
c Contact rate Number of partners HIV prevention and risk reduction strategies
Mixing patterns
Size of core group
D Duration of infectivity Natural history of infection Early diagnosis
Diagnostic interventions Access to HIV testing services
Therapeutic interventions ART provision
Socio-economic deprivation Societal interventions