As there have been many new arrivals, I will address this to all of you, instead of contacting you separately.
My name is Marius Black, and I am the physician who has been in charge of the medical care of the vast majority of the refugees. For those of you who are comfortable with the idea, I would request that you stop by my office for a routine, baseline medical exam. This is not required in any way, but it would allow me to better care for you should you fall ill while you are here.
Secondly, I would like to warn any of you who have arrived from a significant time in the past that you may contract an illness rather like a severe respiratory infection in the next few days. While it will certainly be uncomfortable, it will not be fatal, and you may come by the clinic in order to receive drugs that may help alleviate the symptoms.
Also, if you have come from before the late 1970's, I would like you to come receive a series of vaccinations, including the vaccination for smallpox. It would not do to have an outbreak of any illness in so small and confined of a space.
If you have any questions, please do not hesitate to contact me in person, or via this device.
[Filtered to Hogwarts witches and wizards]
I am well aware that the vast majority of you deny my existence, but I should like to introduce myself to those of you who will allow me to exist.
My name is Marius Black, I am the younger brother of Pollux and Cassiopeia. If you haven't heard of me (as I assume you haven't), it is because I am, indeed, a squib. But I should like to introduce myself to you nonetheless, and I wish you good day.