Incident-The Rojak food poisoning

Last Monday,a 57-year -old woman died due to food poisoning.Others who have patronised the Rojak Stall at Stall No. 320 at Geylang Serai Temporary Market are also found to have food poisoning,a total of more than 100.The Ministry of Health has closed down the shop and advised the public to discard any food items brought from the Rojak Geylang Serai stall.How could this have happened?The stall has been operating for over 20 years and no such incident has ever occurred.Is it possibly another virus outbreak?
However,that is not my main point.This post is to discuss about the stallholders and their attitudes when in business.Yesterday after I came back from my 3rd Language lessons,I tuned in to the radio 95.8 FM.They were holding a discussion session about this incident then.A quote from a man ,translated into English,"...the shopkeepers may only think about gaining profits,not caring much about the consumers."Though it would not be probable that this happened in this case,I would like to discuss about this topic as it has sparked my curiosity.
Do the shopkeepers put the consumers well being before their own personal gains?
Is this an act of selfishness?
My personal opinion:
These shopkeepers should definitely put the well being of the consumers before their gains as it is their responsibility to ensure that the consumers would enjoy their food and that their food is safe to be consumed.It would be selfish for them to use low-quality or expired food as it does no good to customers.In this case,the Rojak stall was also renowned and famous as its Rojak was delicious.All the more should these shopkeepers ensure the safety of their food.
What are your opinions?

Citations:http://www.straitstimes.com/Breaking%2BNews/Singapore/Story/STIStory_360236.html