Oh dear. How sad. Never Mind. The Covid testing bubble is bursting and an admission this morning from Avacta (AVCT) is even more of a disaster than a 27% share price slump suggests. This collapse is only just beginning and will spread across the sector, so completely vindicating we cynics of stocks such as Abingdon (ABDX), Omega Diagnostics (ODX) and others. As a bear, preparing to crack out a celebratory ouzo, Let me explain.