Vaccines may not be as effective for those who are immuno-compromised. Protecting them needs to be made a top priority, says researchers — to keep them safe and to slow the emergence of variants.
The hope was that if people weren't out drinking, they wouldn't be spreading the coronavirus. There were unforeseen benefits to the ban, which ended last month — and negative impacts as well.
For low- and middle-income countries, just obtaining doses has been a challenge. And now concerns are being raised about the effectiveness of the more affordable AstraZeneca option.