I don't think the virus is prevalent in NYC as a whole.
1629 new cases yesterday. 8k+ cases over 14 days. What would the numbers have to be to be considered prevalent? (Asking seriously, not being sarcastic.)
Also that doesn't address the question as to how if schools contribute to the spread it wouldn't cause a spike?
The definition of a spike is an increase in the number of cases. Doesn't contribution to spread obviously lead to an increase in the number of cases = spike?