Wuhan Virus Like SARS & MERS Immunity After Infection for Three Years so How Many Infected in U. S. Thus Far?

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Today on Fox News, much to the chagrin of establishment shill interviewer Gillian Turner, pandemic expert Dr. Marty Makary noted that almost nobody has been reinfected by the wuhan virus, and that immunity after infection should last for two to three years like immunity to the MERS and SARS after infection by those similar viruses. So how many Americans do you suppose have been infected by the wuhan virus during the yearlong spread of that highly contagious disease, and thereby, how many Americans would need to be vaccinated to achieve herd immunity?