Now that health officials are urging us to wear masks again, it’s time for a fresh look at how much difference masks really deliver. A group of university researchers now say most of the time, it’s hardly effective at all. HealthCall’s Lee Kelso has the latest on why masks fail and what you can do about it.

<p>Now that health officials are urging us to wear masks again, it&rsquo;s time for a fresh look at how much difference masks really deliver. A group of university researchers now say most of the time, it&rsquo;s hardly effective at all. HealthCall&rsquo;s Lee Kelso has the latest on why masks fail and what you can do about it.</p>

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