diff --git a/src/AgentContainer.cpp b/src/AgentContainer.cpp
index 65cd23a..2a3d054 100644
--- a/src/AgentContainer.cpp
+++ b/src/AgentContainer.cpp
@@ -671,9 +671,12 @@ void AgentContainer::infectAgents ()
                         if (amrex::Random(engine) < prob_ptr[i]) {
                             status_ptr[i] = Status::infected;
                             counter_ptr[i] = 0.0_rt;
-                            latent_period_ptr[i]     = std::max(amrex::ParticleReal(0.0),amrex::RandomNormal(lparm->latent_length_mean,     lparm->latent_length_std,     engine));
-                            infectious_period_ptr[i] = std::max(amrex::ParticleReal(0.0),amrex::RandomNormal(lparm->infectious_length_mean, lparm->infectious_length_std, engine));
-                            incubation_period_ptr[i] = std::max(amrex::ParticleReal(0.0),amrex::RandomNormal(lparm->incubation_length_mean, lparm->incubation_length_std, engine));
+                            latent_period_ptr[i] = amrex::RandomNormal(lparm->latent_length_mean, lparm->latent_length_std, engine);
+                            infectious_period_ptr[i] = amrex::RandomNormal(lparm->infectious_length_mean, lparm->infectious_length_std, engine);
+                            incubation_period_ptr[i] = amrex::RandomNormal(lparm->incubation_length_mean, lparm->incubation_length_std, engine);
+                            if (latent_period_ptr[i] < 0) { latent_period_ptr[i] = 0.0_rt; }
+                            if (infectious_period_ptr[i] < 0) { infectious_period_ptr[i] = 0.0_rt; }
+                            if (incubation_period_ptr[i] < 0) { incubation_period_ptr[i] = 0.0_rt; }
                             if (latent_period_ptr[i] > (infectious_period_ptr[i]+incubation_period_ptr[i])) {
                                 latent_period_ptr[i] = std::floor(infectious_period_ptr[i]+incubation_period_ptr[i]);
                             }