ide_secir/infection_state.h

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/* 
* Copyright (C) 2020-2026 MEmilio
*
* Authors: Anna Wendler, Lena Ploetzke
*
* Contact: Martin J. Kuehn <Martin.Kuehn@DLR.de>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*     http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef IDESECIR_INFECTIONSTATE_H
#define IDESECIR_INFECTIONSTATE_H
 
#include <cstddef>
#include <array>
namespace mio
{
 
namespace isecir
{
 
enum class InfectionState
{
    Susceptible        = 0,
    Exposed            = 1,
    InfectedNoSymptoms = 2,
    InfectedSymptoms   = 3,
    InfectedSevere     = 4,
    InfectedCritical   = 5,
    Recovered          = 6,
    Dead               = 7,
    Count              = 8
};
 
enum class InfectionTransition
{
    SusceptibleToExposed                 = 0,
    ExposedToInfectedNoSymptoms          = 1,
    InfectedNoSymptomsToInfectedSymptoms = 2,
    InfectedNoSymptomsToRecovered        = 3,
    InfectedSymptomsToInfectedSevere     = 4,
    InfectedSymptomsToRecovered          = 5,
    InfectedSevereToInfectedCritical     = 6,
    InfectedSevereToRecovered            = 7,
    InfectedCriticalToDead               = 8,
    InfectedCriticalToRecovered          = 9,
    Count                                = 10
};
 
// This is an alternative implementation for the infection transitions; currently not used.
static constexpr size_t InfectionTransitionsCount = 10;
 
static const std::array<std::pair<InfectionState, InfectionState>, InfectionTransitionsCount> InfectionTransitionsMap =
    {std::make_pair(InfectionState::Susceptible, InfectionState::Exposed),
     std::make_pair(InfectionState::Exposed, InfectionState::InfectedNoSymptoms),
     std::make_pair(InfectionState::InfectedNoSymptoms, InfectionState::InfectedSymptoms),
     std::make_pair(InfectionState::InfectedNoSymptoms, InfectionState::Recovered),
     std::make_pair(InfectionState::InfectedSymptoms, InfectionState::InfectedSevere),
     std::make_pair(InfectionState::InfectedSymptoms, InfectionState::Recovered),
     std::make_pair(InfectionState::InfectedSevere, InfectionState::InfectedCritical),
     std::make_pair(InfectionState::InfectedSevere, InfectionState::Recovered),
     std::make_pair(InfectionState::InfectedCritical, InfectionState::Dead),
     std::make_pair(InfectionState::InfectedCritical, InfectionState::Recovered)};
 
} // namespace isecir
} // namespace mio
 
#endif