Who has done the vaccination report ?

Question

20 persons are vaccinated. 5 were never vaccinated, 8 were vaccinated once, 4 were vaccinated twice, 3 were vaccinated thrice.

Answer 1

Tag the programming language you're using, provide more information with some sample code piece(if you have one)

Answer 2

What exactly is your question? If you have a problem with the code, please show the code so we can help you.