No, he isn't. Why would you lie like that? 

"From the economist's environment they explained that Milei received the Covid vaccine because he plans a trip to the United States to give a conference and to enter he had to have at least one dose."

"We are absolutely against mandatory vaccination against coronavirus. It is an individual decision and the state cannot be forcing you to get vaccinated and much less should it put a restriction on the movement of human beings with the 'covid passport'."

https://diputadosbsas.com.ar/milei-se-vacuno-y-estallaron-las-redes/