plasma donations from recovered covid-19 patients. blood donations. blood and plasma donors.

abstract black blood carrier characteristic color contagion contagious coronavirus covid covid-19 crowd decoration decorative design desired direction donate donation donations donor donors exception forward handful herd hidden immunity infect infection leader leadership marked massive mutual organization oustanding patient patients pattern people plasma recovered red respect sars-cov-2 sheep show spread stand superspreader symbolizes team teamwork texture trust variety visible wallpaper