You’ve got to eat it, to beat it: That’s the philosophy of one Hanoi chef who is attempting to boost morale in the Vietnamese capital by selling green, coronavirus-themed burgers. Laughing in the face of the global pandemic, Chef Hoang Tung and his team now spend their days moulding dozens of green-tea stained burger buns complete with little “crowns” made of dough to resemble microscopic images of the virus.