Melissa Healy

A health worker prepares a shot of the CoronaVac vaccine on the first day of a COVID-19 vaccination campaign for children age 3 and 4 at a vaccination center in Rio de Janeiro, Brazil, Friday, July 15, 2022. (AP Photo/Bruna Prado)

¿Tendrán los estadounidenses la vacuna covid correcta este otoño? Quizá

July 15, 2022 at 3:55 p.m.

En unos pocos meses, el clima se volverá fresco, se acercará la temporada navideña y es posible que el coronavirus se embarque en su tercer invierno consecutivo de muerte y...

FILE - James Robson, a biomedical engineering graduate student, holds a swab and specimen vial in the new COVID-19, on-campus testing lab, Thursday, July 23, 2020, at Boston University in Boston. The United States has improved its surveillance system for tracking new coronavirus variants such as omicron, boosting its capacity by tens of thousands of samples since early 2021. (AP Photo/Charles Krupa, File)

¿Qué tan malo será Ómicron? Los científicos no lo sabrán por meses

December 1, 2021 at 10:57 p.m.

En un virus que ya mató a 5.2 millones de personas en todo el mundo, unas 50 mutaciones nuevas suenan como pesadilla global. Pero en la antigua batalla entre los...

FILE - In this Jan. 21, 2020, file photo, the Wuhan Huanan Wholesale Seafood Market, where a number of people related to the market fell ill with a virus, sits closed in Wuhan in central China's Hubei province. The Chinese city of Wuhan is looking back on a year since it was placed under a 76-day lockdown beginning Jan. 23, 2020. (AP Photo/Dake Kang, File)

Una nueva mirada a los primeros casos de COVID apunta al mercado de animales vivos como la fuente más probable

November 19, 2021 at 8:52 p.m.

Los teóricos de la conspiración necesitan poco más que sospechas, algunos hechos seleccionados cuidadosamente y una imaginación vibrante para tejer historias sobre los orígenes de la pandemia de COVID-19. Pero...

Hector Montoto, left, receives a Pfizer COVID-19 booster shot from registered nurse Ekaete Ikpeinyang, right, at Jackson Memorial Hospital Tuesday, Oct. 5, 2021, in Miami. This follows a recent recommendation by the Food and Drug Administration and Centers for Disease Control and Prevention advising people who are 65 and older, and workers whose jobs put them at high risk of exposure – including those in healthcare – to receive a booster shot six months after their second shot. (AP Photo/Lynne Sladky)

La protección de la vacuna de Pfizer disminuye con el tiempo, y no debido a la variante Delta, señala un estudio

October 6, 2021 at 9:49 p.m.

La investigación realizada en el sur de California ha confirmado la dramática erosión en la protección de la vacuna de Pfizer-BioNTech contra el COVID-19 frente a las infecciones "de irrupción"....

Max Cuevas, de 12 años, toma la mano de su madre mientras recibe su primera dosis de la vacuna COVID-19.

¿Debería la FDA actuar más rápido con las vacunas COVID-19 para niños pequeños?

September 13, 2021 at 6:51 p.m.

Si usted es el padre de un niño pequeño, empleado de una escuela o, simplemente, alguien que se pone la mascarilla un poco más apretada al ver un grupo de...

A health worker takes a swab sample from a man to test for the COVID-19 coronavirus at a hospital in Wuhan, China's central Hubei province on February 7, 2021.

Long COVID’s daunting toll seen in study of pandemic’s earliest patients

August 27, 2021 at 5:45 p.m.

COVID-19 patients in Wuhan were among the pandemic's first victims, and a comprehensive new study finds that a year after shaking the coronavirus, survivors were more likely than their uninfected...

Registered nurse Anna Yadgaro inoculates Juana Mejia with the Moderna COVID-19 vaccine on May 12, 2021, in New York.

‘Breakthrough’ COVID-19 infections after vaccination are rare, and just 2% result in deaths, CDC says

May 26, 2021 at 1:29 p.m.

In a four-month span during which the U.S. vaccination campaign was in a race against a spate of COVID-19 surges, a nationwide study has found that roughly 10,000 people became...

La Dra. Hannah Milch revisa una mamografía en la UCLA. Los radiólogos están encontrando ganglios linfáticos agrandados en las mamografías de las mujeres que han recibido recientemente una dosis de la vacuna COVID-19, algo que suele ser un signo de cáncer de mama.

Los médicos temen que las vacunas COVID-19 interfieran en las mamografías

May 17, 2021 at 3:04 p.m.

Después de más de un año de ansiosa espera, las mujeres recién vacunadas contra el COVID-19 están acudiendo en masa a las clínicas de mamografía para ponerse al día con...

Can you mix and match coronavirus vaccines? Researchers in Britain are studying to see if switching doses could work.

February 28, 2021 at 2:17 p.m.

A lot of us have engaged in some bold mixing-and-matching during the pandemic — office attire on top, pajama pants on bottom, for instance — and been none the worse...

If you're feeling sick, whether you've recently traveled or not, the CDC recommends staying home, staying in touch with your doctor, limiting contact with other people (and pets) in your home and looking out for these emergency warning signs: trouble breathing, persistent pain or pressure in the chest, confusion and bluish lips or face. You can find full guidelines for those who are sick <a href="https://www.cdc.gov/coronavirus/2019-ncov/if-you-are-sick/steps-when-sick.html">here</a>.

Do testicles make men more vulnerable to the coronavirus?

April 22, 2020 at 5:40 p.m.

Men contending with coronavirus infection may have a pair of vulnerabilities that could increase their risk of longer, more severe illness: their testicles. A pilot study that tracked the clearance...

All Stories