關於Delta - COVID之我見
最近COVID嘅delta strain係世界各地爆到七彩,美國、英國同澳洲都失守,瘋狂社區感染。好多「智者」成日會話疫苗可能有長遠影響而無人知,甚至鼓勵民眾齊齊感染共享肺炎,到底由得COVID爆有咩問題?
Point form
1. 其實好有趣,「智者」們會話無人知疫苗長遠有咩影響,但其實都無人知中完COVID,幸運地康復後長遠有咩重大影響,近排都有唔少研究講long COVID syndrome,係咪真係重感冒咁簡單呢,似乎又唔係。
2. 「智者」們會用最新WHO/CDC/NEJM等嘅研究去講話打完疫苗都係可以照傳染,咁點解要打,仲笑打疫苗嘅人on9承受疫苗風險。的確,疫苗來得太遲,當初對alpha asymptomatic transmission嘅保護力的確相當高,但依加流行緊嘅係delta就變相得返symptomatic disease嘅保護力。即係點?即係可以避免你出現徵狀,但無法避免你傳染俾其他人。
有咩implication?就係如果解封、開關嘅話,打咗疫苗嘅人中招後出現徵狀、要入ICU、要插喉或用呼吸機甚至死亡嘅機會低好多,但無打嘅人就會係Baseline risk。
Delta傳染力特強,唔少國家都似乎打算唔再用以往封城封關封到2046嘅做法,而係盡量幫想打疫苗嘅人打咗先,到之後瘋狂大爆發時,起碼無咁多人要用ICU/呼吸機資源。
3. 瘋狂爆delta有咩問題?就係一些原本諗住淨係俾特定population打嘅疫苗變咗要balance risk and benefit去俾更年輕嘅人打。例如澳洲打AZ由本來限60歲以上就最近降到18歲以上就建議打。
但個問題就出現,AZ或美國J&J Adenovirus vector疫苗有好罕有嘅機會出現VITTS,通常係第一劑嘅4-42日出現,常見於年輕女性。當谷針或市民擔心感染打完AZ後,如果出現頭痛或肚痛咁點算?
無一個醫生會敢寫包單當係vaccine constitutional symptoms,你去睇家庭醫生佢會叫你去急症,你去急症佢會幫你抽Platelet +/- D-dimer +/- fibrinogen。但當個病人好擔心個頭痛或肚痛係因為打疫苗嘅VITTS,有無醫生敢唔做investigation呢?即使目前個rate大約係86/25 million = 0.000344% (Nature and European studies)
0.000344%係咪高?我諗大家中裡有數
但個問題就係,有無人敢孭飛?有無人敢唔驗血就送個病人返屋企?
如是者,每個打完AZ/J&J疫苗嘅病人去醫院,基本上都會抽血,抽完血如果個病人堅持甚至會照CT brain venogram/CTPA/CT venogram/Doppler US等等。
咁代表d咩,代表真係急症嘅病人會因此delay,其他更有需要照CT嘅人又會被delay。
當中用咗幾多醫療資源?就算發達國家都有油盡燈枯嘅一日
4. 醫療資源係有限,由得COVID爆嘅問題就係當資源用盡時,到底救邊個。現代醫療好嘅地方係好多古時會死嘅病,今時今日可以避免到。一個嚴重嘅COVID,及早使用remdesivir, dexamethasone +/- regeneron嘅monoclonal antibodies(有d國家會用Tocilizumab但evidence未太明朗)可以減低重症同死亡率。嚴重時用high flow/NIV/Ventilator又要去ICU 1:1或2:1護士比例去照顧個病人。
我當你1%要ICU support,如果你好似英美咁一日爆幾萬,你每日都會增加幾百個要用ICU資源嘅病人。呢d資源好多時候其他病人,例如COPD exacerbation/renal crisis/trauma/sepsis等等唔少嘅病人都可以靠ICU逃過鬼門關,但如果一路爆,要搶資源時,就要簡人去救。
到底簡邊個去救?邊個但得被救?我地點定義條線?
5. 繼續社區爆發嘅問題係邊?就係好多elective或non urgent嘅治療或手術會被取消。邊d係elective/non urgent?例如激光打腎石、小腸氣、割膽去膽石、前列腺增生、mental health嘅ECT/CBT、allied health嘅rehab/physio/occu/speech等等,下刪幾百種可以改善生活質素嘅手術或治療要被延後。
你可以幻想下一個中完風嘅病人,一般透過physio/occu/speech治療後係可以大大改善生活質素,但因為疫情而無得access呢d服務,甚至可能會miss咗rehab嘅最佳window
呢d全部都要考慮嘅嘢,「智者」們係唔會話你聽,因為佢地無受到呢d嘅影響同時亦唔係醫療嘅service provider,they couldn’t care less about public’s health
6. 醫護人員個個都因為疫情而心力交瘁
照顧每個COVID病人都需要著更多嘅保護衣,花更多嘅時候去做程序,特別係aerosol generating procedures,插完一次喉都定必會成身濕哂。
就算只係簡單嘅打導管同抽血等程序都比以往辛苦同費時。結果就係少咗時間花係其他病人身上。
封城封關封到2046真係會心累,但當社會上充斥著一群反疫苗、反控制疫症、甚至呼籲民眾齊來感染COVID來共享肺炎時,係咪真係幫緊件事?
其實都好明顯見到唔會contain到delta,世界各地嘅做法都開始跟英國,幫哂所有想打疫苗嘅人打之後,就齊齊解封,唔想打嘅人就面對感染同重症甚至死亡嘅風險,informed decision, can’t blame anyone
只不過好多發達國家嘅人都有一股self entitled嘅心,覺得唔打疫苗後中招而重症時,就應份咁享用珍貴嘅醫療資源。
Do you even care how much it costs for the care and treatment of a COVID patient in ICU?
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adenovirus symptoms 在 李木生醫師 Facebook 的最讚貼文
COVID-19疫情的擴散,讓每個人感染病毒的機率大幅增加,除了努力維持社交距離之外,增加疫苗接種的人口比例,是阻止大流行是最有效的方法。
作為一名婦產科醫師,我關心的議題自然圍繞在Covid-19對於孕婦及胎兒的影響。就目前的研究數據顯示,孕婦如果感染新冠肺炎,引發重症或需要呼吸器的比例相較於一般人增加許多,同時導致早產或流產的機率也會增加,雖然在感染病毒後產生症狀的孕婦大約只有3分之一,死亡率只有約2%,但這些數據都顯示孕婦感染Covid-19病毒的危險遠比打疫苗的副作用還高。
許多病人問我孕婦可不可以打COVID-19疫苗?孕婦應該打哪一種比較好?在閱讀文獻資料後,我想在此為大家整理一些相關的最新資訊。
在美國,英國,澳洲與紐西蘭的婦產科醫學會,雖然沒有禁止孕婦施打腺病毒疫苗(例如AZ與嬌生),但目前都建議讓孕婦優先選擇施打mRNA疫苗(例如莫德納與輝瑞)。這個建議原因不是腺病毒疫苗會造成流產或畸形,也不是因為腺病毒在孕婦身上會造成比一般人更多的副作用。而是因為目前在公開的資料中,施打過mRNA 的孕婦追蹤的資料較多。
再者,腺病毒疫苗在50歲以下的民眾會出現罕見的血小板低下與血栓(簡稱TTS) 的副作用。在50歲以下接種腺病毒疫苗的民眾當中,TTS出現的機率約為五萬分之一 (每年發生車禍死亡機率約為千分之一),所以目前在歐美部份國家有兩種以上疫苗可以選擇的前提下,會有讓孕婦優先選擇施打mRNA疫苗的建議。
根據台灣衛生福利部疾病管制署所公佈的疫苗接種注意事項, 孕婦若為COVID-19 之高職業暴露風險者或具慢性疾病而易導致重症者,可與醫師討論接種疫苗之效益與風險後,評估是否接種疫苗。而哺乳中的婦女若為曝露在Covid-19風險當中 (如醫事人員),應完成接種。雖然AZ疫苗的對母乳或受哺嬰兒之影響尚未完全得到評估,但一般認為並不會造成相關風險。接種COVID-19疫苗後,仍可持續哺乳。
目前台灣除了進口除了AZ疫苗之外,未來也將逐步採購及接受國際捐贈,疫苗的種類也將增加嬌生以及莫德納,雖然疫苗目前仍屬珍稀資源,優先施打順序與分配仍應遵照政府相關規定,但未來若能讓民眾能有選擇的空間,我支持孕婦應有自由選擇疫苗的權利。
在此之前,請大家乖乖宅在家裡,勤洗手,戴口罩,預祝大家端午佳節平安。
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The spread of COVID-19 in Taiwan has greatly increased the risk of the virus infection for everyone. Now not only do we need to maintain social distancing but also are preparing for mass vaccination to create herd immunity to protect those vulnerable around us.
As an obstetrician, naturally I read mostly about the effect of COVID-19 and its vaccines to mothers and babies. As of the effect of COVID-19, epidemiological studies show that the COVID-19 infection, compared to non-pregnant people, not only increases risk of maternal morbidity and mortality but also fetal prematurity and stillbirths. Although only 1/3 of infected mothers will develop symptoms, with mortality rate of 1 in 50 people, it is not a risk that any mother would be willing to take.
Thanks to the excellent pharmacovigilance systems around the world, we have now learned a lot more about effect of COVID-19 vaccines in mothers than the beginning of the year, as clinical trials often exclude pregnancies in their participants. Most of the obstetrics and gynecology professional bodies around the world are recommending pregnant women to be preferentially offered mRNA vaccines (such as those from Pfizer-BNT and Moderna). Although the adenovirus vaccines (such as those from AstraZeneca and Johnson-Johnson) are not contraindicated in pregnancy, currently there is more published data about the safety of the mRNA vaccines in pregnancy than the adenovirus ones. Moreover, the small but significant risk of
Thrombosis with Thrombocytopenia Syndrome (TTS) with the adenovirus vaccines that is observed mostly in younger people has prompted many countries to recommend alternative vaccines to people under the age of 50.
With the uncertainties surrounding vaccination timing in Taiwan, pregnant women may be faced with the difficult choice of whether to take the adenovirus vaccine that is available now or to take the risk of virus exposure and wait for the mRNA vaccines. I would encourage pregnant women to speak with their health professionals regarding this issue. And I hope this article empowers my readers with some useful information.