COVID-19 _ icons

1st learn more about covid-19 2nd understand the hot topics 3rd sketch some references 4th draw first wave of icons 5th re_draw the same icons 6th adjust strokes and sizes 7th test in percentages 50% -> 100% 8th re_adjust some parts 9th test ( again ) if it is perceptible 10th done is done and is never finished...