{"id":40308,"date":"2021-06-28T10:05:41","date_gmt":"2021-06-28T16:05:41","guid":{"rendered":"https:\/\/www.uchealth.org\/today\/?p=40308"},"modified":"2024-05-13T09:29:25","modified_gmt":"2024-05-13T15:29:25","slug":"vaccines-work-well-against-covid-19-delta-variant","status":"publish","type":"post","link":"https:\/\/www.uchealth.org\/today\/vaccines-work-well-against-covid-19-delta-variant\/","title":{"rendered":"Vaccines work well against COVID-19 Delta variant"},"content":{"rendered":"
<\/div>
\"The
The Delta variant is causing COVID-19 to spread fast. Vaccines work well to protect you. Be careful in crowds. Photo: Getty Images.<\/figcaption><\/figure>\n

Perhaps you\u2019ve had COVID-19 already. Perhaps you\u2019ve had one of the two vaccine doses but heard that you may feel under the weather the day after that second shot and are putting it off. Perhaps you figure you\u2019re young and healthy and aren\u2019t going to get all that sick even if you do catch the coronavirus. Or perhaps something else is keeping you from being vaccinated.<\/p>\n

If you\u2019re older than 12 and haven\u2019t been vaccinated, buckle up: The Delta variant<\/a> is sweeping the planet. It is roughly 50% more contagious than the Alpha variant, which itself was roughly 50% more contagious than the \u201coriginal\u201d coronavirus strains. Multiply that out and we face a variant that spreads more than twice as easily as the coronavirus that burned around the world a year ago. To extend<\/a> a baseball analogy, if the original coronavirus threw a 100 mph fastball, Alpha hits 150 mph and Delta 225 mph. That sort of competitive advantage is overwhelming.<\/p>\n

\u201cThe presence of variants is directly correlated to the prevalence of vaccinated persons in the community,\u2019\u2019 said Dr. Richard Zane<\/a>, chief innovation officer at UCHealth and professor and chairman of Emergency Medicine at the University of Colorado School of Medicine. \u201cVaccines are like a wall. They prevent the variants from coming in. If you\u2019re not vaccinated, you\u2019re not protected against anything.\u2019\u2019<\/p>\n

\"Dr.
Dr. Richard Zane was thrilled to receive his first dose of a new COVID-19 vaccine. Colorado\u2019s hospitalization rates, while improving, were among the 10 highest in the country as of June 12. Photo by Katie Kerwin McCrimmon.<\/figcaption><\/figure>\n

Zane has seen too many people die or become debilitated from the disease the SARS-CoV-2 virus brings. In the face of yet another still-more-infectious variant \u2013 B.1.617.2, first detected in India, now known as the Delta variant \u2013 now is a moment for action rather than avoidance and the same old excuses, he says.<\/p>\n

Destined for domination<\/strong><\/h2>\n
\"Jonathan
Dr. Jonathan Samet<\/figcaption><\/figure>\n

\u201cWe\u2019re dealing with a strain that\u2019s much more transmissible, which means it will spread more quickly and propagate the pandemic in Colorado,\u201d said Dr. Jonathan Samet<\/a>, dean of the Colorado School of Public Health and leader of the Colorado COVID-19 Modeling Group<\/a>.<\/p>\n

That\u2019s not speculation but rather math. In England, Delta comprised 91% of sequenced cases as of June 18<\/a>. In Colorado, Delta was first detected in late April in Mesa County, home of Grand Junction on the Western Slope. By May 15, Delta had blown past Alpha as the dominant variant there.<\/p>\n

As of June 23, just 40% of Mesa County<\/a> residents were fully vaccinated. Combine Delta with an under-vaccinated population and you get 96% of your ICU beds occupied and 73% of your ventilators running day and night. (Statewide, the figures are 75% ICU occupancy and 35% of critical-care ventilators in use).<\/p>\n

It\u2019s not just Mesa County anymore. The Delta variant comprised<\/a> 75% of new Colorado coronavirus cases as of the week of June 13. Zane says UCHealth now assumes that every new case is Delta.<\/p>\n

\u201cEverybody who has COVID has one of the variants, the Delta variant now being predominant. It is simply inevitable,\u201d Zane said.<\/p>\n

Vaccines drop Delta<\/strong><\/h2>\n

More bad news from across the pond: British researchers assessing 38,805 sequenced cases found<\/a> the Delta variant to increase the risk of hospitalization 2.6 times.<\/p>\n

Now for some good news. If you\u2019re vaccinated, you\u2019re largely protected. Scientists in the UK studied<\/a> the relative effectiveness of two-shot vaccines such as those of Pfizer and Moderna (Johnson & Johnson\u2019s one-shot vaccine was first approved in late May in the United Kingdom) versus the Alpha and Delta variants. They found the vaccines to be 80% effective in stopping symptomatic disease from the Delta variant \u2013 that\u2019s compared to 88% effectiveness of the vaccines against the Alpha variant. Vaccines stopped hospitalization for both Alpha and Delta variants more than 90% of the time.<\/p>\n

But whereas the first vaccine dose was 49% effective against the Alpha variant, one dose only stopped the Delta variant 31% of the time. The second shot was critical, the researchers found.<\/p>\n

\"Dr.
Dr. Richard Zane. Photo by Cyrus McCrimmon for UCHealth.<\/figcaption><\/figure>\n

Statewide and across the country, illnesses and deaths from the coronavirus have fallen sharply since the winter peak. The vast majority of the vulnerable over-65 set have been vaccinated. In Colorado, roughly half the population has been fully vaccinated, though younger demographics are lagging. Intensive care units do not generally risk being overwhelmed, and if there are local surges, the capacity exists across the health care system to share the load.<\/p>\n

But consider that the roughly 300 daily coronavirus deaths across the United States \u2013 a trickle compared to the flood of more than 600,000 U.S. deaths since the start of the pandemic \u2013 is about triple the number of those who die in car accidents each day in this country. Consider also the now-expired dilemma of easing social distancing measures for the sake of commerce versus the need to keep the health care system from being overwhelmed. Colorado and most of the rest of the country are pretty much open for business. We don\u2019t need to throttle the economy to ensure the health and safety of our fellow man. We simply must join the hundreds of millions who have already been fully vaccinated.<\/p>\n

Worldwide, 2.7 billion vaccine doses had been administered as of June 23, to kids as young as 12. That number would be far higher if vaccine supply met demand. The vaccines many of us in the United States can\u2019t be bothered with would be snapped up in a heartbeat most everywhere else.<\/p>\n

Virus mutations<\/strong><\/h2>\n

It\u2019s hard to say what the Delta variant<\/a> will mean for the pandemic. Where there\u2019s less vaccination, there will be more cases. How many will there be? How serious will they be? Will waning vaccine efficacy bring reinfections? How will Delta affect the many with weak immune systems \u2013 the elderly foremost?<\/p>\n

Samet and his modeling group are wrestling with these and many more unknowns. One certainty is that there will be new variants. As Zane put it, \u201cEither viruses don\u2019t enter a host, or they enter a host and try and mutate. That\u2019s just what they do.\u201d<\/p>\n

Added Samet, \u201cThe virus mutates. It\u2019s always going to, and the most transmissible is going to win out.\u201d<\/p>\n

Zane doesn\u2019t blame the virus.<\/p>\n

\u201cSometimes I think I\u2019m maybe a little bit too blunt, but we\u2019re doing this to ourselves,\u201d he said.<\/p>\n

He believes that we\u2019ll look back on this pandemic\u2019s countless tragedies and view one of the greatest as our having allowed more transmissible and virulent variants to spread and kill despite having a bounty of incredibly effective vaccines available to stop them.<\/p>\n","protected":false},"excerpt":{"rendered":"

Perhaps you\u2019ve had COVID-19 already. Perhaps you\u2019ve had one of the two vaccine doses but heard that you may feel under the weather the day after that second shot and are putting it off. Perhaps you figure you\u2019re young and healthy and aren\u2019t going to get all that sick even if you do catch the […]<\/p>\n","protected":false},"author":23,"featured_media":40380,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_relevanssi_hide_post":"","_relevanssi_hide_content":"","_relevanssi_pin_for_all":"","_relevanssi_pin_keywords":"","_relevanssi_unpin_keywords":"","_relevanssi_related_keywords":"","_relevanssi_related_include_ids":"","_relevanssi_related_exclude_ids":"","_relevanssi_related_no_append":"","_relevanssi_related_not_related":"","_relevanssi_related_posts":"","_relevanssi_noindex_reason":"","footnotes":""},"categories":[6],"tags":[4859,4860,9069],"class_list":["post-40308","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-healthy-living","tag-coronavirus","tag-covid-19","tag-covid-19-vaccine"],"acf":[],"yoast_head":"\nVaccines work well against COVID-19 Delta variant - UCHealth Today<\/title>\n<meta name=\"description\" content=\"The Delta variant is sweeping the planet. 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