๐ฆ ๐ Seriously, how much vaccination is enough to reach herd immunity? How does the expected epidemic size depend on homophily in vaccine adoption?
๐ arxiv.org/abs/2112.07538.
1) We find that already a small level of homophily (h) can considerably increase the critical vaccine coverage (ฯแถแตฅ) required for herd immunity and that stronger homophily can push this threshold entirely out of reach.
2) Our framework is general enough to account for homophily by adherence to other epidemic interventions that reduce the susceptibility or infectiousness of individuals, such as #social_distancing practices, use of protective equipment, and adoption of digital #contact_tracing.
3) Vaccines' efficacy against susceptibility or transmitting the infection can vary. For perfect vacc, the epidemic size increases monotonically as a function of homophily, while for vacc with limited efficacy, the epidemic size is max. at an intermediate level of homophily.
๐ arxiv.org/abs/2112.07538.
1) We find that already a small level of homophily (h) can considerably increase the critical vaccine coverage (ฯแถแตฅ) required for herd immunity and that stronger homophily can push this threshold entirely out of reach.
2) Our framework is general enough to account for homophily by adherence to other epidemic interventions that reduce the susceptibility or infectiousness of individuals, such as #social_distancing practices, use of protective equipment, and adoption of digital #contact_tracing.
3) Vaccines' efficacy against susceptibility or transmitting the infection can vary. For perfect vacc, the epidemic size increases monotonically as a function of homophily, while for vacc with limited efficacy, the epidemic size is max. at an intermediate level of homophily.