FAQ: COVID-19 Variants

Let’s keep learning and stay updated as we continue this fight against COVID-19. Read below for frequently asked questions about the current COVID-19 variants. We are committed to sharing fact-based information to keep you and your family informed and safe.

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How do mutations in the virus that causes
COVID-19 happen?

Viruses mutate or change often. Mutations happen at random during the copying process. When a virus is growing inside a person, it may change or become damaged while making more copies. In most viruses, these mistakes are harmless, but sometimes, a mutation can make a virus more concerning to scientists.

Do the current vaccines have the same effectiveness against COVID-19 variants?

Researchers are monitoring new COVID-19 variants closely. This includes research to see whether new variants may change the protective effects of the current vaccines. So far studies suggest that antibodies gathered through vaccination with the current authorized vaccines do recognize new variants.

What are the notable COVID-19 variants in the United States?

  • Alpha: This variant was first detected in the United States in December 2020. It was initially detected in the United Kingdom.
  • Beta: This variant was first detected in the United States at the end of January 2021. It was initially detected in South Africa in December 2020.
  • Gamma: This variant was first detected in the United States in January 2021. It was initially identified in travelers from Brazil, who were tested during routine screening at an airport in Japan, in early January.
  • Delta: This variant was first detected in the United States in March 2021. It was initially identified in India in December 2020.

When should I wear my mask?

Whether you have or have not been vaccinated, many health experts across the country are advising to protect yourself and others by wearing masks:

  • Any time you’re in a large group setting.
  • Any time you are traveling on a plane, bus, train, or other form of public transportation traveling into, within, or out of the United States and in U.S. transportation hubs such as airports and stations.
  • When you are around people who do not live with you, including inside your home or inside someone else’s home.
  • Inside your home if someone you live with is sick with symptoms of COVID-19 or has tested positive for COVID-19.
 

COVID-19病毒的變異是如何發生的?

病毒經常變異或變化。突變在複製過程中隨機發生。當病毒在人體内生長時,它可能會在複製更多副本時發生變化或損壞。在大多數病毒中,這些錯誤是無害的,但有時,突變會使病毒更受科學家的關注。
當前的疫苗對COVID-19變體是否具有相同的效力?
研究人員正在密切監測新的COVID-19變種。這包括研究新變種是否會改變當前疫苗的保護作用。迄今爲止的研究表明,通過使用當前授權的疫苗接種疫苗而收集的抗體確實可以識別新的變異體。
美國有哪些顯著的COVID-19病毒變種?
  • Alpha: 該變種於2020年12月在美國首次被發現,最初在英國被發現。
  • Beta: 該變種於2021年1月底首次在美國被發現,最初於2020年12月在南非被發現。
  • Gamma: 該變種於2021年1月首次在美國被發現。它最初是在來自巴西的旅客中發現的,他們於1月初在日本機場常規篩查中被測試出來。
  • Delta: 該變種於2021年3月首次在美國被發現。它最初於2020年12月在印度被發現。
我應該在什麽時候佩戴口罩?
無論您是否接種過疫苗,全國許多健康專家都建議佩戴口罩以保護自己及他人:

  • 任何時候在大型團體環境中
  • 任何時候當乘坐飛機、巴士、火車和其他公共交通工具進入美國、在美國境内旅行或離開美國,以及在美國的公共交通樞紐,例如機場和車站。
  • 當您與非同住者共處時,不論在您的家中或別人的家中。
  • 如果與您同住的人出現COVID-19症狀或COVID-19檢測呈陽性,在您家中應佩戴口罩。
Visit Vaccines.gov
To find a vaccination or testing site,
visit www.vaccines.gov.
 
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