By Manas Mishra (Reuters) -The U.S. Food and Drug Administration’s expert advisers will discuss the timing of additional COVID-19 vaccine boosters and the people eligible for the extra shots in a meeting later this week, the health agency said on Monday. The independent advisers will also discuss at the April 6 meeting the FDA’s role in how future versions of COVID vaccines are created to help fight new variants. It could be similar to the current process of selecting the composition of the seasonal flu shot, where regulators pick the strain to use for the coming year’s vaccines, FDA staff sai…