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By Kara Fox, CNN

Wednesday, August 18

WHAT'S NEW THIS WEEK

The White House is expected to advise most Americans to get a third Covid-19 dose, a move that will align the US with a growing number of rich countries that have turned to booster shots in the face of the highly transmissible Delta variant and waning immunity.

• US President Joe Biden's plan, expected to be discussed on Wednesday, would see booster shots rolled out in mid- to late September, one source told CNN, pending authorization from the US Food and Drug Administration (FDA). The news follows the recommendation last week by the US Centers for Disease Control and Prevention (CDC) that people with immunocompromised systems get an extra dose of the vaccine.
  
  

• Data from vaccine-maker Pfizer-BioNTech submitted to the FDA showed that the third dose elicited a significantly higher antibody response against the initial strain of the coronavirus, as well as against the Delta and Beta variants, compared with that seen following a two-dose course.   

   

• But the FDA and CDC say there is no clear argument yet for giving boosters to people with normal immune systems, as data continues to show that the vaccines still protect against severe disease. As Delta surges across the US, nearly all of those becoming severely ill with the virus are unvaccinated.  
   

• Public health experts aren't convinced, either. The answer to reducing deaths and hospitalizations, many say, is simple: Get unvaccinated people the shots first. Scott Hensley, an immunologist at the University of Pennsylvania, points to the fact that some 90 million eligible Americans remain unvaccinated -- and are the main vehicle for the virus' spread across the country. "Of course we want people to be protected and to receive the full course," he said. "But what we are trying to move against is giving a third dose to people who already are well protected." He added: "If you think a third dose of the vaccine is going to end the pandemic, then you are kidding yourself. The way to end this pandemic is to get the vaccine distributed across the globe." 

   

• It's an argument the World Health Organization has been making for months. Fiercely opposed to the use of booster shots for now, WHO says the move will undoubtedly exacerbate vaccine inequality. Countries including Israel, Germany, France and the United Arab Emirates have already authorized booster shots for older adults. But only 1.3% of people in low-income countries have received at least one dose, according to Oxford University's Our World in Data.  

   

• Andrew Pollard, director of the Oxford Vaccine Group at the University of Oxford, and Seth Berkley, chief executive of Gavi, the Vaccine Alliance, warned in an essay published by the Guardian on Friday that "large-scale boosting in one rich country would send a signal around the world that boosters are needed everywhere." They said: "This will suck many vaccine doses out of the system, and many more people will die because they never even had a chance to get a single dose." 
  
  
• Meanwhile, in Afghanistan, the ongoing chaos in the wake of the Taliban takeover is taking a "heavy toll" on the country's "fragile health system," WHO Spokesperson Jarik Jašarević said Tuesday, with disruption at the airport delaying urgently needed health supplies, including Covid vaccines. Crowding at health facilities and internally displaced people's camps will further hamper infection prevention measures, he said.

THE LATEST NUMBERS

Source: Johns Hopkins University

YOU ASKED. WE ANSWERED.

Q

Are boosters unusual when it comes vaccines? 

A

No, needing additional shots of a vaccine is not at all unusual, CNN Medical Analyst Dr. Leana Wen says. Many vaccines require multiple doses to achieve full immune protection, like the polio vaccine, for example, which requires four doses, or the hepatitis vaccine, which needs three. There are other vaccines that require occasional "boosts" because immunity may wane over time, such as the tetanus-diphtheria vaccine.  

Other vaccines need to be administered more often, like the flu vaccine, which requires an annual shot. This is not so much to boost our immunity, but because each season there are new strains targeted by the vaccine, Wen explains. 

As Covid-19 is a relatively new disease, we don't yet know if one more dose will be required to complete a course, as in the case of the three-dose hepatitis vaccine; if occasional "boosts" for immunity may be needed, like with the tetanus shot; or if new strains may emerge, which require updated shots to target them. 

Send your questions here. Are you a health care worker fighting Covid-19? Message us on WhatsApp about the challenges you're facing: +1 347-322-0415.

TOP 3

READS OF THE WEEK

A pedestrian crosses Featherston Street in Wellington, New Zealand during the first day of the country's national lockdown on August 18.

New Zealand reports its first case of Delta, goes into national lockdown  

New Zealand went into a nationwide lockdown late Tuesday night, hours after confirming one Covid-19 case -- the first locally transmitted infection since February. On Wednesday, New Zealand authorities announced they had confirmed another six cases, all linked to the original.

The outbreak marks the first time New Zealand has confirmed the presence of the Delta variant in the community and authorities are still determining how it got there. The country shut borders to almost all foreigners last year and required most incoming travelers to go through state-run quarantine -- an approach that has allowed New Zealand to avoid the devastating waves seen in other countries, and bring life largely back to normal.  

Now the country joins at least 142 others that have reported cases of the Delta variant. New Zealand's director-general of health, Ashley Bloomfield, warned Wednesday that it could see between 50 and 120 more cases based on modeling that took Delta into account. "Our job now is to find any and every case," he said. 

Some politicians are using Covid-era misinformation to side with lies

The Covid-19 pandemic has presented a golden window to undermine confidence in the media and, in some cases, for world leaders to launch outright assaults on some of the most respected and important journalistic institutions in their countries, Luke McGee writes. 

This month, the Polish parliament passed a bill that could shutter the country's largest independent news channel, TVN24, a broadcaster that frequently criticizes the Polish governing party. Also this month, Austrian Chancellor Sebastian Kurz put forward a plan that would effectively pull funding from the nation's oldest newspaper.

All of this could be tied to the timing around the Covid-19 pandemic, media experts say. "In times of crisis trust in government goes up because people just want somebody to fix things, so you see people rally around the flag," Ben Page, chief executive of polling firm Ipsos MORI said, adding that these spikes in support provide a window of opportunity that "distracts from what you are doing elsewhere." And if you are a politician seeking to capitalize on this, whacking and weakening the press is a relatively easy proposition. 

Child Covid cases are increasing, and this could be just the beginning 

Cases of Covid-19 among children have steadily increased since the beginning of July, according to a report from the American Academy of Pediatrics (AAP). More than 121,000 child Covid-19 cases were reported in the US last week, which the AAP called "a continuing substantial increase." 

Public health experts continue to advocate for children to wear masks in school, especially as children under 12 are currently ineligible for the vaccine. But to their frustration, some state governors have attempted to ban such requirements. "Why tie the hands of the public health officials behind their backs? You have two weapons here, one is vaccines the other is masking, and for children less than 12 that's the only weapon they have," Dr. Paul Offit, a member of the US Food and Drug Administration's vaccine advisory committee, told CNN. A study published in the Proceedings of the National Academy of Sciences further supports the case for masking. It found that other mitigation measures -- such as physical distancing and handwashing -- are "insufficient by themselves" in curbing the pandemic without mask use, too.  

Meanwhile, the majority of American parents plan to send children into school this year, but want more information about Covid safety measures that are in place, according to a survey published Wednesday by the State and Territory Alliance for Testing, Rockefeller Foundation, and RAND Corporation. Just 27% of parents said they knew in detail which Covid-19 prevention measures had been implemented by their child's school, according to the survey, with 60% saying they would like more information about safety precautions.