[Souce: USA Today]

Hopes are dimming that “herd immunity” can help stamp out the tenacious global pandemic amid growing concerns that people can be reinfected with COVID-19.

Experts agree that claims of recurring infections require more study since we are only months into the health crisis and evidence has been anecdotal. But if it's proven that recovered patients can “catch” the virus a second time, it would affect their own immunity while also complicating efforts to obtain the Holy Grail of current medical research: effective vaccines.

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