
    Given a patient's current health status represented as a binary number where each bit indicates a specific medical condition (1 for present, 0 for absent), develop a function that identifies and activates the leftmost inactive health marker to update the patient's risk assessment profile. The function should scan through the binary representation from left to right and set the first encountered 0 to 1, maintaining all other existing health indicators unchanged.
    

    
def set_left_most_unset_bit(n):
    """
    Given a patient's current health status represented as a binary number where each bit indicates a specific medical condition (1 for present, 0 for absent), develop a function that identifies and activates the leftmost inactive health marker to update the patient's risk assessment profile. The function should scan through the binary representation from left to right and set the first encountered 0 to 1, maintaining all other existing health indicators unchanged.
    

    """
def set_left_most_unset_bit(n):
    """
    Given a patient's current health status represented as a binary number where each bit indicates a specific medical condition (1 for present, 0 for absent), develop a function that identifies and activates the leftmost inactive health marker to update the patient's risk assessment profile. The function should scan through the binary representation from left to right and set the first encountered 0 to 1, maintaining all other existing health indicators unchanged.
    

    """
    if not n & n + 1:
        return n
    (pos, temp, count) = (0, n, 0)
    while temp:
        if not temp & 1:
            pos = count
        count += 1
        temp >>= 1
    return n | 1 << pos