Sex

Sex

name: str

Name of interaction in the params file.

get_num_acts(model, rel) classmethod

Simulate random transmission of HIV between two agents through Sex. One of the agents must be HIV+.

Parameters:

Name	Type	Description	Default
model	model.TITAN	The model being run	required
rel	agent.Relationship	Relationship	required

Source code in titan/interactions/sex.py

@classmethod
def get_num_acts(cls, model: "model.TITAN", rel: "agent.Relationship") -> int:
    """
    Simulate random transmission of HIV between two agents through Sex. One of the agents must be HIV+.

    args:
        model: The model being run
        rel : Relationship
    """
    # unprotected sex probabilities for primary partnerships
    mean_sex_acts = (
        rel.get_number_of_sex_acts(model.np_random) * model.calibration.sex.act
    )
    total_sex_acts = poisson(model.np_random, mean_sex_acts)

    # Get condom usage
    p_safe_sex = (
        rel.agent1.location.params.demographics[rel.agent1.race]
        .sex_type[rel.agent1.sex_type]
        .safe_sex[rel.bond_type]
        .prob
    )

    # increase condom usage if diagnosed
    if rel.agent1.hiv.dx or rel.agent2.hiv.dx:  # type: ignore[attr-defined]
        # Calculate probability of safe sex given risk reduction
        p_unsafe_sex = (1 - p_safe_sex) * (
            1 - model.params.hiv.dx.risk_reduction.sex
        )
        p_safe_sex = 1 - p_unsafe_sex

    # Reduction of risk acts between partners for condom usage
    unsafe_sex_acts = total_sex_acts
    for n in range(unsafe_sex_acts):
        if model.run_random.random() < p_safe_sex:
            unsafe_sex_acts -= 1

    return unsafe_sex_acts