Fortunately, bed bugs do not transmit diseases.
There a world-wide epidemic of b.b. infestations occurring right now. These little buggars are incredibly athletic and can go w/out a blood meal for months.
If you received a notification it likely means there's a real problem because landlords and property management companies, along with housing authorities, rarely chose to inform tenants w/out being told they must do so by local officials.
In your shoes, I would request a complete inspection of my unit by a professional PCO and I would take preventative measures such as installing scientifically tested bed bug mattress and box spring encasements and researching other products such a climbups, food grade diatomaceous earth fossil powder, etc. (I do not have any connection to any of the companies that produce thesae products -- there are many which do).
Only 7 or 10 people react to bed bug bites. Bed bugs normally come out to feed in the wee hours of the AM and are attracted to CO2. Similarly to mosquitoes, one cannot feel the bites when they occur, but the tell-tale red welts (up to the size of a quarter and usually in clusters of 3-4 on the abdomen, neck and face and 1-2 on the arms, legs and feet) show up within hours.
We survived a bed bug infestation in our building. A tenant had let it go unreport for, what is estimated to be, a full year. It was very upsetting to say the least -- and extremely emotionally and physically trying and financially costly. We have a large place and found it early.
The preparation process before the extermination is tedious and physcially laborious.
We ended up having to pack every single item we owned into plastic bags,, half-full and spun, then tied w/a twist tie. You can imagine how difficult this process was for me. It took 7 full days of work to complete it and LOTS of tylenol and praying.
I would not wish a bed bug infestation on anyone. As a matter of fact, while I haven't ever had lice or fleas of any other vermin; I would take them over the bed bugs any day.
Bed bugs care not if you are rich or poor, young or old, sick or well -- they are opportunistic and "hijack" on purses, luggage, library books, movie theater seats, etc.
The end result for us was a cost of over $3,000.00 to deal with the problem and take preventative precautions for the future. We have, without a doubt, been "schooled" on bed bugs.
There are loads of misconceptions out there about how to deal with and prevent bed bugs. One of the biggest misconceptions is that if you do not see them, you do not have them. Another is that they only like beds and unholstered furniture. Both untrue.
As mentioned, to date there are no medical reports that point to bed bugs can transmit disease -- this is, at least, somewhat comforting.
I would suggest you google 'bedbugger.com' and also look at youtube..com for 'bed bug tv' to learn more.
All the best of luck to you w/this!