Dear Doctors: I heard there will be a saliva test to see who has a high risk of getting prostate cancer. I don’t see how saliva would have anything to do with your prostate gland. How does the test work, and how can I get access to it?

DEAR HARRIETTE: I am the president of the parent-teacher association at my daughter’s school, and at a recent meeting, the principal suggested that it is mandatory for us to buy food from the school canteen so that all the kids will have the same food and not feel jealous or envious of others who have more expensive options. What do you think I should suggest so that we can all be on the same page while explaining that we prefer to bring healthier snacks from home rather than buying ready-made ones? – Mandatory Canteen DEAR MANDATORY CANTEEN: Take a quick poll from a few parents to get a sense of how other families feel about this idea. Do so discreetly, as you do not want to start a buzz about this sensitive topic. With your polling data and your own feelings, schedule a meeting with the principal to voice your concerns. Though the principal’s intentions are good, there are many reasons why this thinking is flawed. In your case, you prefer to make fresh, healthy snacks. For other students, I’m sure there will be dietary or health restrictions. The very students the principal is trying to protect may be further embarrassed if they buy no snacks because their parents cannot afford to pay for them.

Putting aside the question of whether he will be inaugurated as president come January, is there any chance that Donald Trump will deport millions of undocumented immigrants from the United States? To anybody who knows very much about what’s actually going on in the American economy, the answer is no.

DEAR HARRIETTE: My husband and I live in Wisconsin and are fortunate to own a second lakeside property.