The incubation stage of an illness is of concern to day care workers because of option C: children in this stage often pass on the disease even though they show no signs of it.
During the incubation stage, a person may be infected with a pathogen but does not yet show any symptoms. This means that they can still transmit the illness to others, including other children in a day care setting. This is especially worrisome as young children, particularly those in day care, are more susceptible to infections due to their developing immune systems and close proximity to one another.
Day care workers need to be aware of the incubation periods for various illnesses, as it affects their ability to prevent the spread of infection. They need to enforce proper hygiene practices among the children and maintain a clean and sanitized environment to minimize the risk of transmission. Additionally, identifying children in the incubation stage allows day care workers to monitor and care for them properly, ensuring that they receive any necessary medical attention and are separated from other children when necessary.
Therefore, while option A may also be true to some extent, option C is the primary reason why the incubation stage of an illness is of concern to day care workers.