21.   Delays in the production of flu vaccine have led federal health officials to recommend that the drug first go to people most at risk, like the elderly.

22.   Despite the surge, health officials say there should be plenty of flu vaccine, unlike last year.

23.   Do not let the temporary shortage stop you from getting the flu vaccine as soon as the supply warrants.

24.   Dozens of letters had passed between the FDA and the company in a regulatory showdown over standards for making a safe and effective flu vaccine.

25.   Each year new versions of flu vaccines are made based on recommendations from public health agencies about which infectious strains are likely to cause outbreaks.

26.   Eventually, all the flu vaccine that was needed would be forthcoming.

27.   Even some vaccines, including the flu vaccine, are safe to administer to pregnant women.

28.   Even with the costs and inconvenience associated with flu vaccines, the treatments already are becoming more popular with employers as a means of reducing absenteeism, Read said.

29.   Experts in immunization, though, question whether any strategy can ensure that flu vaccine will be distributed equitably once it hits the open market.