This year is going to be moderate for Sagittarian natives regarding their health. Some minor niggles here and there are possible, but the same won't turn into anything serious to trouble you much. Ketu's transit in 12th House can give you some mental stress and lack of sleep, but other than that, nothing substantial is indicated which could trouble you this year.
Maintaining a healthy lifestyle, including eating right and exercising, could make things right for you regarding your health. Your parents' health will be a little sluggish, while your spouse's health will be a little sluggish in the second half of the month. The health of your children will be good.