Pollen could play a role in curbing the spread of the coronavirus, according to a new study in the Netherlands.In the country known for its fields of tulips, researchers noticed that the number of Covid-19 cases dropped during the blooming season – but went up sharply afterwards.A team from the Open University of the Netherlands suspected pollen could have something to do with it.“Pollen is documented to be allergenic, it plays a role in immuno-activation and defence against respiratory viruses…