blood word red cell cluster clot condition disease

antidote antivirus artery background ball biological biology blood bloodcell bloodcells care cell cells close closeup clot cluster condition cure curing disease disorder donate donating donation drive drug drugs genetic genetics give giving health healthcare healthy hemophilia hemophiliac ill illness illustrated illustration letters life medical medicine micro microbiology microscopic red render research researching round science scientific sick sickness sphere stroke treat treatment unhealthy vaccination vaccine vascular vein word