People get sick, especially in autumn. And they infect each other. Reporting that some people working at the lab were sick, without any knowledge about kind of sickness is only going to add fuel to the conspiracy theories.
>... is only going to add fuel to the conspiracy theories.
That's a bad thing only if the conspiracy theory is false. At this point, the theory that the Chinese Communistic Party conspired to cover up a lab leak is not implausible. There are multiple known occurrences of pathogens escaping from laboratories.
Do you realise that this is very easily true for any company or office at that time of the year?
Does the US government "have reason to believe that several teachers in a high school in Milan became sick in autumn 2015 with symptoms consistent with both Covid and seasonal flu"? Yes, it does! Good job, US government!