My 15 year old son was possibly exposed to covid-19 as he spent his lunch break friday 26 march with a child that has tested positive. we see my mother-in law regularly and would like to know if all four of us can get tested to ensure her safety?

Testing is advisable, stay self isolated as a family until screened. Check with local resources, your insurance company and provider to schedule the testing. Watch for signs of shortness of breath, cough and fever. If you child develops acute changes and worsening, please see the Emergency department.

The specifics about who and when testing is provided differs in different parts of the world. In South Africa I believe there is an online tool to screen you that gives guidance on what to do. They also require a local doc provide referral documents. Check their site or you local doc for details.