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Figure 1 | BMC Infectious Diseases

Figure 1

From: 4Flu - an individual based simulation tool to study the effects of quadrivalent vaccination on seasonal influenza in Germany

Figure 1

Transmission and immunity dynamics in the simulations: black arrows indicate births and disease progression, red solid arrows indicate infections, green arrows indicate successful vaccinations, and grey arrows show loss of immunity; dotted red arrows indicate cross-immunization against a B lineage caused by an infection or vaccination with the other B lineage; vaccinations and infections can also booster existing immunity (indicated by a “+”); arrows for deaths (which drain each single compartment) were omitted.

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