Consider the following data which summarizes a group of people by the number of doses of Covid-19 vaccine they have received and whether or not they contracted Covid-19.

	covid	no covid
2 doses	6	63
one dose	10	54
no doses	45	16

If a person is randomly selected from the above group of people, find the probability that they contracted Covid-19, given that they received at least one dose of vaccine.

Enter your answer as an exact fraction, e.g., 7/16