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FILE - In this July 25, 2018, file photo, is a vial of ketamine, which is normally stored in a locked cabinet, in Chicago.

How Would CO Regulate Ketamine Administration?

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Lawmakers passed a bill Tuesday that would place restrictions on the use of ketamine by paramedics outside of hospitals.
This Saturday, March 6, 2021 file photo shows vials of Johnson & Johnson COVID-19 vaccine at a pharmacy in Denver.

U.S. Extends Expiration Dates for J&J COVID Vaccine by Six Weeks

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Johnson & Johnson said U.S. regulators extended the expiration date on millions of doses of its COVID-19 vaccine by six weeks.
Why do some people get side effects after COVID-19 vaccines? Temporary side effects including headache, fatigue and fever are signs the immune system is revving up -- a normal response to vaccines. And they’re common. “The day after getting these vaccines, I wouldn’t plan anything that was strenuous physical activity,” said Dr. Peter Marks, the U.S. Food and Drug Administration’s vaccine chief, who experienced fatigue after his first dose. Here's what’s happening: The immune system has two main arms, and the first kicks in as soon as the body detects a foreign intruder. White blood cells swarm to the site, prompting inflammation that’s responsible for chills, soreness, fatigue and other side effects. This rapid-response step of your immune system tends to wane with age, one reason younger people report side effects more often than older adults. Also, some vaccines simply elicit more reactions than others. That said, everyone reacts differently. If you didn’t feel anything a day or two after either dose, that doesn’t mean the vaccine isn't working. Behind the scenes, the shots also set in motion the second part of your immune system, which will provide the real protection from the virus by producing antibodies. Another nuisance side effect: As the immune system activates, it also sometimes causes temporary swelling in lymph nodes, such as those under the arm. Women are encouraged to schedule routine mammograms ahead of COVID-19 vaccination to avoid a swollen node being mistaken for cancer. Not all side effects are routine. But after hundreds of millions of vaccine doses administered around the world — and intense safety monitoring — few serious risks have been identified. A tiny percentage of people who got vaccines made by AstraZeneca and Johnson & Johnson reported an unusual type of blood clot. Some countries reserved those shots for older adults but regulatory authorities say the benefits of offering them still outweigh the risks. People also occasionally have serious allergic reactions. That's why you're asked to stick around for about 15 minutes after getting any type of COVID-19 vaccine — to ensure any reaction can be promptly treated. Finally, authorities are trying to determine whether temporary heart inflammation that can occur with many types of infections also might be a rare side effect after the mRNA vaccines, the kind made by Pfizer and Moderna. U.S. health officials can't yet tell if there's a link but say they're monitoring a small number of reports, mostly male teens or young adults.

Why Do Some People Get Side Effects after COVID-19 Vaccines?

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Temporary side effects including headache, fatigue and fever are signs the immune system is revving up -- a normal response to vaccines.
In this Saturday, May 15, 2021, file photo, empty vials of the Pfizer COVID-19 vaccine lie in a box during a vaccine campaign in Ebersberg near Munich, Germany.

Heart Reaction Probed as Possible Rare Vaccine Link in Teens

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Health authorities are trying to determine whether heart inflammation could be a rare side effect in teens and young adults after the second COVID-19 vaccine.
In this Dec. 29, 2020, file photo, Pat Moore, with the Chester County, Pa., Health Department, fills a syringe with Moderna COVID-19 vaccine before administering it to emergency medical workers and health care personnel at the Chester County Government Services Center in West Chester, Pa.

Moderna Says Its COVID-19 Shot Works in Kids As Young As 12

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This could put Moderna's shot on track to become the second option for that age group in the U.S.
FILE - In this July 25, 2018, file photo, is a vial of ketamine, which is normally stored in a locked cabinet, in Chicago.

CO House Passes Chemical-Restraint Bill

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Colorado Democrats effort to substantially limit first responders' use of ketamine and other chemical restraints passed the House on Friday.
In this Dec. 29, 2020, file photo, Pat Moore, with the Chester County, Pa., Health Department, fills a syringe with Moderna COVID-19 vaccine before administering it to emergency medical workers and health care personnel at the Chester County Government Services Center in West Chester, Pa.

Why Are Patents On COVID Vaccines Are So Contentious?

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Why is the pharmaceutical industry so opposed to lift patent protections on COVID-19 vaccines to help poor parts of the world?

Let’s Get It Straight: Influenza Vaccines for 2021-22

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Infection control consultant Katherine West explains the new influenza vaccines for the upcoming year.
This photo provided by Hikma Pharmaceuticals shows Kloxxado.

U.S. Approves High-Dose Opioid Reversal Nasal Spray

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The Food and Drug Administration approved Hikma Pharmaceuticals’ Kloxxado, a spray containing eight milligrams of naloxone.
In this Monday, April 26, 2021 file phto, a nursing student administers the Moderna COVID-19 vaccine at a vaccination center at UNLV in Las Vegas.

U.S. Officials: Anxiety Drove Vaccine Reactions in Five States

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The clusters detailed Friday by the CDC are an example of a phenomenon that's been chronicled for decades from different vaccines.