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October 14–November 18, 2019 8 Working Nurse l WorkingNurse.com ON THE QUICK Nursing & Healthcare News H ave you gotten a flu shot yet? The CDC recommends getting vaccinated before Halloween, as experts warn we may be in for another severe flu season. Sniffles Down Under Since the Southern Hemisphere expe- riences winter during our summers and vice versa, their flu season also precedes ours. If Australia's most recent flu season is a preview of what the U.S. can expect, we could be fac- ing a rough winter. Australia suffered a record number of influenza cases this year, due in part to what epidemi- ologists call "vaccine mismatch." Because there are so many differ- ent strains of influenza, vaccine selec- tion is always a gamble: Public health officials must decide months in advance which three or four strains will be the next season's biggest threats. If any of those guesses are wrong, the flu vaccine's effectiveness will be much lower. It now appears that's what hap- pened in Australia. Two of the four strains the World Health Organization (WHO) recommended for this year's Southern Hemisphere flu shots were different from the strains that hit Australia, prompting WHO to change its recommendations for next year. A Gamble Worth Taking Unfortunately for us, the influenza A/H3N2 strain the FDA finally selected for this season's U.S. flu shots — a last- minute change that delayed the ship- ment of about 70 million vaccine doses — won't provide much protection against the Australian H3N2 strain. While this may be bad news, it shouldn't discourage anyone from getting a flu shot as soon as possible. With diseases as prevalent as influen- za, even a partially effective vaccine can make a big difference. A recent paper in the CDC's Morbidity and Mortality Weekly Report estimates that during the 2017–18 flu season (which was also quite severe), flu shots prevented 7.1 million illnesses, 109,000 hospitaliza- tions and 8,000 deaths. WN For direct links to the websites cited, find these articles at WorkingNurse.com Get Your Flu Shot ASAP Bad Australian flu season may signal trouble for the U.S. Although it can't prevent every infection, flu vaccination still saves lives