“The global outbreak of Monkeypox is clearly unusual and concerning”, said WHO director Tedros Adhanom Gebreyesus. A significant global outbreak of monkeypox virus that started in May 2022 was primarily found in networks of men who have sex with men (MSM). Global vaccine supplies are limited in the current outbreak. A modeling study to explore optimal allocation of vaccines against monkeypox virus (MPXV) provides a road map for public health to maximize the impact of a limited supply of vaccines. A recent study has revealed that prioritizing vaccines to larger networks with more initial infections and greater potential for spread is best. The article is published in CMAJ (Canadian Medical Association Journal).
‘Prioritizing vaccinations for a larger network, a network with more initial infections and a higher potential for epidemics, can prevent more infections.’
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“We hope that these insights can be applied by policy-makers across diverse and dynamic epidemic contexts across Canada and beyond to maximize infections averted early in an epidemic with limited vaccine supply,” says Dr. Sharmistha Mishra, MAP Centre for Urban Health Solutions, Unity Health Toronto.Read More..
As of November 4, 2022, there were 1444 cases of MPXV in Canada, disproportionately among gay, bisexual, and other men who have sex with men (GBMSM). A very limited supply of smallpox vaccines is available and is being prioritized to populations experiencing disproportionate risks.
Factors Influencing Vaccine Allocation
Researchers modeled two hypothetical cities as interconnected networks with a combined GBMSM community size of 100,000. The team then varied the characteristics of the two cities across a range of plausible settings and simulated roll-out of 5000 vaccine doses shortly after the first detected case of MPXV.Advertisement
“Under our modeling assumptions, we found that vaccines could generally avert more infections when prioritized to a larger network, a network with more initial infections and a network with greater epidemic potential,” writes Jesse Knight, lead author and PhD candidate at the University of Toronto and MAP Centre for Urban Health Solutions, Unity Health Toronto. “Our findings further highlight the importance of global vaccine equity in responding to the outbreaks, and also in preventing them in the first place,” he says.
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“Strategic prioritization of a limited vaccine supply by network-level risk factors can maximize infections averted over short time horizons in the context of an emerging epidemic, such as the current global MPXV outbreak,” conclude the authors.
Source-Eurekalert