Posted in NEWS Why it’s been relatively easy to vaccinate against COVID-19 compared to HIV or cancer June 12, 2021 Why has it been so easy to vaccinate against COVID-19 when other medical problems remain intractable? Biology. http://rssfeeds.usatoday.com/~/654564504/0/usatoday-newstopstories~Why-its-been-relatively-easy-to-vaccinate-against-COVID-compared-to-HIV-or-cancer/