def dependency_on_R0_homogeneous_model_example():
"""
Example of several computations of the limit Eff_∞ in homogeneous scenarios
in which R0 varies.
"""
# Severities: gs = [asymptomatic, symptomatic]
t_0 = 0
R0_list = [0.5, 1, 2, 3]
Effinfty_values_list = []
for R0 in R0_list:
p_gs, b0_gs = make_scenario_parameters_for_asymptomatic_symptomatic_model(
R0=R0)
b_negative_times = None # tuple(b0_g.normalize() for b0_g in b0_gs)
scenario = HomogeneousScenario(
p_gs=p_gs,
b0_gs=b0_gs,
tauS=tauS,
t_0=0,
ss=(lambda t: 0, lambda t: 0.5 if t >= t_0 else 0),
sc=lambda t: 0.7 if t >= t_0 else 0,
xi=lambda t: 0.9 if t >= t_0 else 0,
DeltaAT=delta_distribution(peak_tau_in_days=2),
)
(
t_in_days_list,
nu,
nu0,
R,
R_by_severity,
FT_infty,
) = compute_time_evolution_homogeneous_case(
scenario=scenario,
t_max_in_days=20,
nu_start=1000,
b_negative_times=b_negative_times,
verbose=True,
threshold_to_stop=0.001,
)
Rinfty = R[-1]
Effinfty = effectiveness(Rinfty, R0)
Effinfty_values_list.append(Effinfty)
plt.xlabel("R0")
plt.ylabel("Eff_∞")
plt.grid(True)
plt.xlim(0, R0_list[-1])
plt.ylim(0, 0.6)
plt.plot(
R0_list,
Effinfty_values_list,
color="black",
),
plt.show()
def dependency_on_testing_timeliness_homogeneous_model_example():
"""
Example of several computations of the limit Eff_∞ in homogeneous scenarios
in which the time interval Δ^{A → T} varies from 0 to 10 days.
"""
# Severities: gs = [asymptomatic, symptomatic]
p_gs, b0_gs = make_scenario_parameters_for_asymptomatic_symptomatic_model()
t_0 = 0
DeltaAT_values_list = [i for i in range(10)]
Effinfty_values_list = []
for DeltaAT_in_days in DeltaAT_values_list:
scenario = HomogeneousScenario(
p_gs=p_gs,
b0_gs=b0_gs,
tauS=tauS,
t_0=0,
ss=(lambda t: 0, lambda t: 0.5 if t >= t_0 else 0),
sc=lambda t: 0.7 if t >= t_0 else 0,
xi=lambda t: 0.9 if t >= t_0 else 0,
DeltaAT=delta_distribution(peak_tau_in_days=DeltaAT_in_days),
)
(
t_in_days_list,
nu,
nu0,
R,
R_by_severity,
FT_infty,
) = compute_time_evolution_homogeneous_case(
scenario=scenario,
t_max_in_days=20,
nu_start=1000,
b_negative_times=b0_gs,
verbose=False,
threshold_to_stop=0.001,
)
Rinfty = R[-1]
Effinfty = effectiveness(Rinfty, R0)
Effinfty_values_list.append(Effinfty)
fig = plt.figure(figsize=(10, 15))
Rinfty_plot = fig.add_subplot(111)
Rinfty_plot.set_xlabel("Δ^{A → T} (days)")
Rinfty_plot.set_ylabel("Eff_∞")
Rinfty_plot.grid(True)
Rinfty_plot.set_xlim(0, DeltaAT_values_list[-1])
Rinfty_plot.set_ylim(0, 0.4)
Rinfty_plot.plot(
DeltaAT_values_list,
Effinfty_values_list,
color="black",
),
plt.show()
def dependency_on_app_adoption_example():
"""
Example of several computations of the limit Eff_∞ with app usage, where the fraction p^app of app adopters varies.
"""
# Severities: gs = (asymptomatic, symptomatic)
p_gs, b0_gs = make_scenario_parameters_for_asymptomatic_symptomatic_model()
epsilon_app_list = [0.0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0]
Effinfty_values_list = []
for epsilon_app in epsilon_app_list:
scenario = ScenarioWithApp(
p_gs=p_gs,
b0_gs=b0_gs,
tauS=tauS,
t_0=0,
ssapp=(lambda t: 0, lambda t: 0.5),
ssnoapp=(lambda t: 0, lambda t: 0.2),
scapp=lambda t: 0.7,
scnoapp=lambda t: 0.2,
xi=lambda t: 0.9,
DeltaATapp=delta_distribution(peak_tau_in_days=2),
DeltaATnoapp=delta_distribution(peak_tau_in_days=4),
epsilon_app=lambda t: epsilon_app,
)
(
t_in_days_list,
nu,
nu0,
Fsigmaapp_infty,
R,
R_app,
R_noapp,
FT_infty,
FT_app_infty,
FT_noapp_infty,
) = compute_time_evolution_with_app(
scenario=scenario,
t_max_in_days=40,
nu_start=1000,
b_negative_times=b0_gs,
threshold_to_stop=0.001,
)
Rinfty = R[-1]
Effinfty = effectiveness(Rinfty, R0)
Effinfty_values_list.append(Effinfty)
fig = plt.figure(figsize=(10, 15))
Rinfty_plot = fig.add_subplot(111)
Rinfty_plot.set_xlabel("ϵ_app")
Rinfty_plot.set_ylabel("Eff_∞")
Rinfty_plot.grid(True)
Rinfty_plot.set_xlim(0, 1)
Rinfty_plot.set_ylim(0, 0.3)
Rinfty_plot.plot(
epsilon_app_list,
Effinfty_values_list,
color="black",
),
plt.show()
def dependency_on_efficiencies_example():
"""
Example of several computations of the limit Eff_∞ with app usage,
where the parameters s^{s,app} and s^{c,app} vary.
"""
# Severities: gs = (asymptomatic, symptomatic)
p_gs, b0_gs = make_scenario_parameters_for_asymptomatic_symptomatic_model()
ssapp_list = [0.0, 0.2, 0.4, 0.6, 0.8, 1.0]
scapp_list = [0.0, 0.2, 0.4, 0.6, 0.8, 1.0]
Effinfty_values_list = []
for scapp in scapp_list:
Effinfty_values_list_for_scapp = []
for ssapp in ssapp_list:
scenario = ScenarioWithApp(
p_gs=p_gs,
b0_gs=b0_gs,
tauS=tauS,
t_0=0,
ssapp=(lambda t: 0, lambda t: ssapp),
ssnoapp=(lambda t: 0, lambda t: 0.2),
scapp=lambda t: scapp,
scnoapp=lambda t: 0.2,
xi=lambda t: 0.9,
DeltaATapp=delta_distribution(peak_tau_in_days=2),
DeltaATnoapp=delta_distribution(peak_tau_in_days=4),
epsilon_app=lambda t: 0.6,
)
(
t_in_days_list,
nu,
nu0,
Fsigmaapp_infty,
R,
R_app,
R_noapp,
FT_infty,
FT_app_infty,
FT_noapp_infty,
) = compute_time_evolution_with_app(
scenario=scenario,
t_max_in_days=20,
nu_start=1000,
b_negative_times=b0_gs,
threshold_to_stop=0.001,
)
Rinfty = R[-1]
Effinfty = effectiveness(Rinfty, R0)
Effinfty_values_list_for_scapp.append(Effinfty)
print(
f"s^{{s,app}} = {ssapp}, s^{{c,app}} = {scapp}, Eff_∞ = {round(Effinfty, 2)}"
)
Effinfty_values_list.append(Effinfty_values_list_for_scapp)
ssapp_values_array, scapp_values_array = np.meshgrid(
ssapp_list, scapp_list)
Effinfty_values_array = np.array(Effinfty_values_list)
fig = plt.figure(figsize=(6.5, 5))
plt.contourf(ssapp_values_array,
scapp_values_array,
Effinfty_values_array,
levels=100)
fig.suptitle("Eff_∞")
plt.xlabel("s^{s,app}")
plt.ylabel("s^{c,app}")
plt.colorbar()
plt.show()
def dependency_on_share_of_symptomatics_homogeneous_model_example():
"""
Example of several computations of the limit Eff_∞ in homogeneous scenarios
in which the fraction p_sym of symptomatic individuals and their contribution to R^0 vary.
"""
p_sym_list = [0.3, 0.4, 0.5, 0.6, 0.7]
x_axis_list = []
Effinfty_values_list = []
for p_sym in p_sym_list:
contribution_of_symptomatics_to_R0 = 1 - math.exp(
-4.993 * p_sym) # Random choice, gives 0.95 when p_sym = 0.6
R0_sym = contribution_of_symptomatics_to_R0 / p_sym * R0
R0_asy = (1 - contribution_of_symptomatics_to_R0) / (1 - p_sym) * R0
# Severities: gs = (asymptomatic, symptomatic)
p_gs, b0_gs = make_scenario_parameters_for_asymptomatic_symptomatic_model(
p_sym=p_sym,
contribution_of_symptomatics_to_R0=
contribution_of_symptomatics_to_R0,
)
scenario = HomogeneousScenario(
p_gs=p_gs,
b0_gs=b0_gs,
tauS=tauS,
t_0=0,
ss=(lambda t: 0, lambda t: 0.5),
sc=lambda t: 0.7,
xi=lambda t: 0.9,
DeltaAT=delta_distribution(peak_tau_in_days=2),
)
(
t_in_days_list,
nu,
nu0,
R,
R_by_severity,
FT_infty,
) = compute_time_evolution_homogeneous_case(
scenario=scenario,
t_max_in_days=20,
nu_start=1000,
b_negative_times=b0_gs,
verbose=False,
threshold_to_stop=0.001,
)
Rinfty = R[-1]
Effinfty = effectiveness(Rinfty, R0)
Effinfty_values_list.append(Effinfty)
x_axis_list.append(
f"p_sym = {p_sym},\nκ={round(contribution_of_symptomatics_to_R0, 2)},\nR^0_sym={round(R0_sym, 2)},\nR^0_asy={round(R0_asy, 2)}"
)
plt.xticks(p_sym_list, x_axis_list, rotation=0)
plt.xlim(0, p_sym_list[-1])
plt.ylim(0.13, 0.3)
plt.ylabel("Eff_∞")
plt.grid(True)
plt.plot(
p_sym_list,
Effinfty_values_list,
color="black",
),
plt.show()
def dependency_on_generation_time_homogeneous_model_example():
"""
Example of several computations of the limit Eff_∞ in homogeneous scenarios
in which the default distribution ρ^0 of the generation time is rescaled by different factors.
"""
rescale_factors = [0.6, 0.8, 1, 1.2, 1.4, 1.6, 1.8]
expected_default_generation_times_list = []
Effinfty_values_list = []
for f in rescale_factors:
def rescaled_rho0_function(tau):
return (1 / f) * rho0(tau / f)
rescaled_rho0 = generate_discrete_distribution_from_pdf_function(
pdf=lambda tau: rescaled_rho0_function(tau * TAU_UNIT_IN_DAYS) *
TAU_UNIT_IN_DAYS,
tau_min=1,
tau_max=TAU_MAX_IN_UNITS,
normalize=True,
)
EtauC0 = rescaled_rho0.mean() # Expected default generation time
expected_default_generation_times_list.append(EtauC0)
# Severities: gs = (asymptomatic, symptomatic)
p_gs, b0_gs = make_scenario_parameters_for_asymptomatic_symptomatic_model(
rho0_discrete=rescaled_rho0)
scenario = HomogeneousScenario(
p_gs=p_gs,
b0_gs=b0_gs,
tauS=tauS,
t_0=0,
ss=(lambda t: 0, lambda t: 0.5),
sc=lambda t: 0.7,
xi=lambda t: 0.9,
DeltaAT=delta_distribution(peak_tau_in_days=2),
)
(
t_in_days_list,
nu,
nu0,
R,
R_by_severity,
FT_infty,
) = compute_time_evolution_homogeneous_case(
scenario=scenario,
t_max_in_days=20,
nu_start=1000,
b_negative_times=b0_gs,
verbose=False,
threshold_to_stop=0.001,
)
Rinfty = R[-1]
Effinfty = effectiveness(Rinfty, R0)
Effinfty_values_list.append(Effinfty)
plt.ylim(0, 0.8)
plt.grid(True)
plt.plot(
expected_default_generation_times_list,
Effinfty_values_list,
color="black",
),
plt.xlabel("E(τ^{0,C})")
plt.ylabel("Eff_∞")
plt.title(
"Effectiveness under rescaling of the default generation time distribution"
)
plt.show()
def dependency_on_contribution_of_symptomatics_homogeneous_model_example():
"""
Example of several computations of the limit Eff_∞ in homogeneous scenarios
in which the fraction contribution of symptomatic infections to R^0 vary.
"""
contribution_of_symptomatics_to_R0_list = [0.7, 0.8, 0.9, 1]
x_axis_list = []
Effinfty_values_list = []
p_sym = 0.6
for kappa in contribution_of_symptomatics_to_R0_list:
R0_sym = kappa / p_sym * R0
R0_asy = (1 - kappa) / (1 - p_sym) * R0
# Severities: gs = (asymptomatic, symptomatic)
p_gs, b0_gs = make_scenario_parameters_for_asymptomatic_symptomatic_model(
p_sym=p_sym,
contribution_of_symptomatics_to_R0=kappa,
)
scenario = HomogeneousScenario(
p_gs=p_gs,
b0_gs=b0_gs,
tauS=tauS,
t_0=0,
ss=(lambda t: 0, lambda t: 0.5),
sc=lambda t: 0.7,
xi=lambda t: 0.9,
DeltaAT=delta_distribution(peak_tau_in_days=2),
)
(
t_in_days_list,
nu,
nu0,
R,
R_by_severity,
FT_infty,
) = compute_time_evolution_homogeneous_case(
scenario=scenario,
t_max_in_days=20,
nu_start=1000,
b_negative_times=b0_gs,
verbose=False,
threshold_to_stop=0.001,
)
Rinfty = R[-1]
Effinfty = effectiveness(Rinfty, R0)
Effinfty_values_list.append(Effinfty)
x_axis_list.append(
f"p_sym = {p_sym},\nκ={round(kappa, 2)},\nR^0_sym={round(R0_sym, 2)},\nR^0_asy={round(R0_asy, 2)}"
)
plt.xticks(contribution_of_symptomatics_to_R0_list,
x_axis_list,
rotation=0)
plt.xlim(0.5, 1)
plt.ylim(0.13, 0.3)
plt.ylabel("Eff_∞")
plt.grid(True)
plt.plot(
contribution_of_symptomatics_to_R0_list,
Effinfty_values_list,
color="black",
),
plt.show()