Nick Vivarelli International CorrespondentOscar winner Helen Mirren is helping Italy’s COVID-19 vaccination effort by appearing in a side-splitting video titled “La Vacinada,” shot with top comic Checco Zalone, that has gone viral, scoring more than 2.7 million views.In the video, Mirren is doing some gardening on a roadside in Southern Italy, when Zalone, playing a Spaniard, stops to ask for directions and notices a mark on her arm where she’s had her jab.He then breaks into song as a