Panic attacks, trouble breathing, relapses that have sent her to bed for 14 hours at a time: At 35, Marissa Oliver has been forced to deal with the specter of death on COVID-19’s terms, yet conversations about her illness, fear and anxiety haven’t been easy.That’s why she headed onto Zoom to attend a Death Cafe, a gathering of strangers willing to explore mortality and its impact on the living, preferably while sipping tea and eating cake.”In the Death Cafe, no one winces,” said Oliver, who was diagnosed with the virus in March. “Now, I’m writing down everything in my life that I want to achieve.”Death Cafes, part of a broader “death-positive” movement to encourage more open discussion about grief, trauma and loss, are held around the world, in nearly 100 countries. While many haven’t migrated online in the pandemic, others have.The global virus toll and the social isolation it has …