Learn Chinese, learn Mandarin — How to say ” I got flu. All body aches.” in Chinese:我得了流行性感冒，全身疼痛。 Wo3 de2 le5 liu2 xing2 xing4 gan3 mao4, quan2 sheng1 teng2 tong4.

Learn Chinese, learn Mandarin — How to say ” I got flu. All body aches.” in Chinese:我得了流行性感冒，全身疼痛。 Wo3 de2 le5 liu2 xing2 xing4 gan3 mao4, quan2 sheng1 teng2 tong4. Wo3 ( 我 I ) de2 (得 got) le5 (了 a particle to show things occurred or the change of status from healthy to getting a cold) liu2 xing2 xing4 (流行性 contagious type) gan3 mao4 (感冒 cold), quan2 (全 all) shen1 (身 body) teng2 tong4 (疼痛 pains and aches).
感冒 means cold, however 流行性感冒 means influenza or flu. For bird flu, we call it 禽流感 qin2 liu2 gan3.For the flu shot, it is 流行性感冒予防针 liu2 xing2 xing4 gan3 mao4 yu4 fang2 zhen1。liu2 xing2 xing4 gan3 mao4 can be called liu2 gan3 流感 for short.