Just to reiterate:
It's up to Govt to decide what businesses should close and when. Nobody should be discouraged by posters on here. If you want to work, as things stand the experts say you can. Check out the HSE site and make sure you understand how the virus is transmitted from person to person - basically an infected person needs to cough or sneeze (sneezing isn't a common symptom) into your nose, mouth or eyes on onto a surface that you subsequently touch and transfer to your nose, mouth or eyes. Using an alcohol hand sanitiser kills the virus on your hands and normal household disinfectants kill it on surfaces.
To be honest, you're gonna touch a lot of infected surfaces and produce if you leave the gaff, particularly if you go to a supermarket where thousands of shoppers pass through so you should already be paying attention to hand hygiene and disinfecting surfaces and stuff others have touched.
Not going to work will not make you immune to the virus. Nobody is trying to prevent it's spread or stop you from getting it. What Govt and HSE are trying to do is slow the spread to maintain deaths and illness at manageable levels rather than having everyone sick at the same time. In all likelihood a vaccine and improved treatments will be developed as time progresses, that's an obvious incentive for individuals to try to hold out as long as possible. If that's what you want to do I guess self-isolation is the place to be. However, as a community we must take our advice and instruction from Govt, who are acting on expert advice with regard to whatever targets they have set for managing the spread of the virus.