i design a tab include publishing data feilds,and another one for epidemiologic table’s feilds;
Did you use a portal on the second tab for displaying the epdemiologic data? Since each artical may have more than one entry, you need that portal. If you enable "allow creation of related records" in the relationship between your two portals, you don't need a button to add additional records in this portal. A delete portal row button can be placed in the portal row and used to delete the portal record, provided you enable portal row deleting in portal setup for this portal.