Volunteers discuss side-effects after receiving Moderna and Pfizer Covid-19 vaccines

Volunteers who received two of the potential coronavirus vaccines in the US have spoken out about the side-effects they experienced following their jabs. This month, Moderna and Pfizer announced their vaccine candidates had been tested to 94.5 per cent and 95 per cent efficacy respectively. Jennifer Haller, who was injected on 16 March with Moderna’s experimental vaccine in Seattle, told WVPI-TV she only experienced mild side-effects as a result. 'I had two doses of the vaccine four weeks apart,” she told the broadcaster. “Each time my arm was pretty sore the next day but besides that I personally didn't experience any other side effects.' Ms Haller was the first person to receive a shot of Moderna’s candidate at the Kaiser Permanente Washington Health Research Institute as part of the first human trial of a vaccine to prevent the virus.