Jessamyn Smyth hopes that two shots in the arm may be what finally delivers her from a year in which the lasting effects of Covid-19 wreaked chaos in her life. Smyth says that after coming down with an acute infection in March 2020, she continued experiencing a constellation of health issues. For months, she has suffered from breathlessness, irregular and rapid heartbeat, diarrhea, and unusual skin rashes. Like many "long haulers," Smyth's fatigue was a constant "knock-down-pass-out-for-15-hours pathological exhaustion," she explained in an email to CNN…. But then she got her vaccine. Within a couple of weeks, her fatigue and cognitive issues were "noticeably better," she said. Her rashes were gone. And after her second Pfizer dose, on February 24, her symptoms kept improving.