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Models of
COVID impact
on meningitis
infections
Dr Caroline Trotter
clt56@cam.ac.uk
Models of meningitis
Models developed to assess the impact of meningococcalvaccines were adapted to
investigate COVID impact
1) to investigate the effect of lower vaccine uptake on infectiondynamics
2) to investigate the impact of social distancing measures on infection dynamics
Settings
a) countriesin the African meningitis belt using MenAfriVac (Karachaliou et al 2015)
b) UK in relation to MenACWY teenage programme (Christensen et al 2014)
MenAfriVac disruption
For MenAfriVac, short-termdisruptionsin 2020areunlikely tohavea significant impact due to the
persistence of direct and indirect benefits from past introductory campaignsof the 1- to 29-year-old
population, bolsteredby inclusion of the vaccine into the routine immunisationschedule accompanied
by further catch-upcampaigns
MenACWY in UK -methods
Pandemic modelling assumptions:
• 18-month pandemic timeframe
(March 2020 to September 2021)
• Reduced meningococcal vaccinations
(34% reduction in MenACWY vaccine uptake)
• Reduced social interactions*
(75% reduction in social mixing for periods of school closure;
60% reduction in social mixing for periods of school openings)
• Vaccine uptake and social interactions return to “normal” in Sept 2021
*Jarvis, C. I. et al. (2020).Quantifying theimpactof physical distance measureson the
transmission of COVID-19 in theUK. BMC Medicine.
MenACWY in UK
- results
We predict a substantial reduction
in carriage (and disease, not
shown) as a result of social
distancing
This far outweighs effect of fall in
uptake in 2020/21
Thank you

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Dr Caroline trotter

  • 1. Models of COVID impact on meningitis infections Dr Caroline Trotter clt56@cam.ac.uk
  • 2. Models of meningitis Models developed to assess the impact of meningococcalvaccines were adapted to investigate COVID impact 1) to investigate the effect of lower vaccine uptake on infectiondynamics 2) to investigate the impact of social distancing measures on infection dynamics Settings a) countriesin the African meningitis belt using MenAfriVac (Karachaliou et al 2015) b) UK in relation to MenACWY teenage programme (Christensen et al 2014)
  • 3.
  • 4. MenAfriVac disruption For MenAfriVac, short-termdisruptionsin 2020areunlikely tohavea significant impact due to the persistence of direct and indirect benefits from past introductory campaignsof the 1- to 29-year-old population, bolsteredby inclusion of the vaccine into the routine immunisationschedule accompanied by further catch-upcampaigns
  • 5. MenACWY in UK -methods Pandemic modelling assumptions: • 18-month pandemic timeframe (March 2020 to September 2021) • Reduced meningococcal vaccinations (34% reduction in MenACWY vaccine uptake) • Reduced social interactions* (75% reduction in social mixing for periods of school closure; 60% reduction in social mixing for periods of school openings) • Vaccine uptake and social interactions return to “normal” in Sept 2021 *Jarvis, C. I. et al. (2020).Quantifying theimpactof physical distance measureson the transmission of COVID-19 in theUK. BMC Medicine.
  • 6. MenACWY in UK - results We predict a substantial reduction in carriage (and disease, not shown) as a result of social distancing This far outweighs effect of fall in uptake in 2020/21