Antibody testing may become quite important, but it is in the early stages of development. There are many laboratories looking to produce antibody tests. If these tests are sensitive enough and specific enough for COVID-19, a positive test would prove a person had had COVID-19 while a negative test would prove a person had not had COVID-19. We need to be certain these are effective, validated tests before we can rely upon their results and use the information in a helpful way.