Allergic to cockroach a problem to everybody or just people from slums and the south?

Anyone. Anyone can develop allergy to cockroach. Cockroaches are one of the most prevalent insects on the planet. Most, if not everyone, has had enough exposure to develop allergy if they are an allergic individual. However, to have significant symptoms from cockroach allergy, a higher exposure is necessary. This would be common in multifamily dwellings, the inner city, or areas of poor sanitation.