近期，歐洲新冠肺炎（COVID-19）疫情出現回升趨勢，挪威甚至發現了一種傳播能力更強的突變新毒株。關於這種毒株的更多特性，目前尚待進一步研究，但輿論擔憂病毒的不斷突變，會給本冬季的全球防疫增加更多不確定性。挪威衛生機構日前對外證實，近日在該國中部城市特隆赫姆（Trondheim）發現了一種病毒的新變種，它的傳播能力比其它已知類型的毒株更強。
據瑞典大報《世界新聞》（VG）報導，這種暫時被命名為M439K的新型病毒株，以前從來沒有在挪威出現過，在現有的國際數據庫中也沒有發現記錄。該病毒是本月16日從特隆赫姆的聖奧拉夫醫院送至挪威公共健康研究所（NIPH）化驗後發現的。
報導援引該市資深醫生羅斯塔德（Tove Røsstad）的話表示，雖然目前還不知道這種新的病毒變種的更多屬性，但初步的分析顯示，在特隆赫姆，人們更容易感染這種病毒，而且即使不在密閉空間近距離接觸，也有可能感染。
研究發現，新毒株的表面蛋白有三個變化：其中兩個變化導致刺突蛋白（S蛋白）縮短，而病毒與人體細胞結合的區域也有一個稍微重要的變化。挪威衛生機構認定，這種變異的病毒的傳播速度，比以往發現的其它類型的毒株傳播速度更快。
綜合外媒報導特隆赫姆的這一輪疫情先在Edge髮廊爆發，其後通過密切接觸傳播到了隔壁的小倫敦酒吧，目前已感染了至少35例，並導致1500人隔離。初步的研究確認，M439K突變病毒株屬於冠狀病毒的遺傳亞組，稱為B.1.5。至於新毒株的變化究竟會如何影響病毒感染，或是引起疾病的能力及方式有哪些變化，目前還在進一步研究中。
今年8月下旬，香港、荷蘭、比利時、美國等國家曾先後發現，有患者感染新冠病毒並完全康復一段時間後，再次確診感染了病毒。而進一步的研究發現，這些患者第二次感染的病毒毒株，與其第一次感染的毒株基因排序明顯不同。
今年10月12日，國際醫學期刊《柳葉刀》（The Lancet）發表的一份研究報告也確認，感染過病毒的患者，即使產生了相應的抗體，也不能保證在所有情況下都對病毒具有完全的抵抗力。這份報告呼籲公眾，無論是否曾確診並康復，都應堅持採取預防措施，以儘量避免感染病毒。
Recently, the European new crown pneumonia ( COVID-19 ) epidemic rebound trend, Norway and even found a stronger ability to communicate new mutant strains. As for more characteristics of this strain, further research is currently needed, but public opinion is concerned that the continuous mutation of the virus will add more uncertainty to the global epidemic prevention this winter. Norwegian health authorities recently confirmed that the external, recently in the central city of the country Trondheim ( Trondheim ) found a new variation on the virus, which spread more capable than other known types of strains.
According to the Swedish newspaper “World News” ( VG ), this new virus strain, temporarily named M439K , has never appeared in Norway before, and no record has been found in existing international databases. The virus was found after being sent to the Norwegian Institute of Public Health ( NIPH ) from St. Olaf’s Hospital in Trondheim on the 16th of this month .
The report quoted the city’s senior doctor Tove Røsstad as saying that although more attributes of this new virus variant are not yet known, preliminary analysis shows that in Trondheim, people are more susceptible to this type of infection. Viruses, and even if you are not in close contact in a confined space, you may be infected.
The study found that there are three changes in the surface protein of the new strain: two of the changes result in the shortening of the spike protein ( S protein), and there is also a slightly important change in the area where the virus binds to human cells. The Norwegian health agency determined that this mutated virus is spreading faster than other types of strains found in the past.
Comprehensive foreign media reported that this round of Trondheim’s epidemic first broke out in the Edge hair salon, and then spread to the small London bar next door through close contact. At least 35 cases have been infected and 1,500 people have been isolated. Preliminary research confirmed that the M439K mutant virus strain belongs to the genetic subgroup of coronaviruses , called B.1.5 . As for how changes in new strains will affect virus infection , or what changes in the ability and ways to cause disease, further research is currently under way.
In late August this year , Hong Kong , the Netherlands, Belgium , the United States and other countries have successively discovered that some patients were diagnosed with the virus again after they were infected with the virus and recovered completely for a period of time. Further research found that the second infection of these patients had a significantly different genetic sequence from the first infection.
This year 10 Yue 12 days, the international medical journal ” The Lancet ” ( at The Lancet ) published a research report also confirmed that patients infected with the virus, even if the corresponding antibodies, there is no guarantee have the virus in all cases Complete resistance . This report calls on the public, regardless of whether they have been diagnosed and recovered, to insist on taking preventive measures to avoid contracting the virus as much as possible.