These are headings that give titles to the topics being discussed in the paragraphs after them.
Explanation:
The lines that were underlined are:
Herd about the Flu
Where is the shot, and why can't you get it?
These are the headings that give titles to the topics being discussed in the paragraphs after them.
After the first heading, we get some basic information about the flu - about how contagious and severe it is, and about how there is a flu shot that you can (or in this case - can't) get.
After the second heading, we get an explanation about why we can't get the flu shot.
