美國CDC的原文：
1. First, mRNA COVID-19 vaccines are given in the upper arm muscle or upper thigh, depending on the age of who is getting vaccinated.
2. After vaccination, the mRNA will enter the muscle cells. Once inside, they use the cells’ machinery to produce a harmless piece of what is called the spike protein. The spike protein is found on the surface of the virus that causes COVID-19. After the protein piece is made, our cells break down the mRNA and remove it, leaving the body as waste.
3. Next, our cells display the spike protein piece on their surface. Our immune system recognizes that the protein does not belong there. This triggers our immune system to produce antibodies and activate other immune cells to fight off what it thinks is an infection. This is what your body might do if you got sick with COVID-19.
4. At the end of the process, our bodies have learned how to help protect against future infection with the virus that causes COVID-19. The benefit is that people get this protection from a vaccine, without ever having to risk the potentially serious consequences of getting sick with COVID-19. Any side effects from getting the vaccine are normal signs the body is building protection.
用中文簡化一下：
1. mRNA疫苗在上臂或大腿注入人體。。。
2. 接種後，mRNA會進入肌肉細胞內，利用細胞的內部機製生成一種無害的刺突蛋白，該種蛋白就是新冠病毒表麵上的刺突蛋白。。。
3. 接下來，我們的細胞將刺突蛋白表達在細胞表麵，我們的免疫係統發現該蛋白不屬於那裏，認為是一種感染，於是觸發免疫反應，生成抗體並啟動免疫細胞對抗它認為的感染，這也是當你真得了新冠時免疫係統所會做的。
4. 。。。。
解讀重點： 1. mRNA疫苗會進入我們的細胞（這不同於任何其它疫苗）。 2. 免疫係統認為是一種感染（事實上確實是一種人為的感染），免疫係統會像對抗真正新冠感染時一樣運作。（雖沒明說，但眾所周知，會殺掉被"感染"的細胞）。
由此可得推論： 被mRNA疫苗進入的細胞會被免疫係統殺死， 也就是說，mRNA疫苗會導致被其進入的細胞死亡。
於是問題來了：mRNA疫苗會進入我們身體哪些地方的細胞？ 答案顯然是：不確定。 CDC隻輕描淡寫的說將進入肌肉細胞，但實際上疫苗的去向是不可控的，即使沒有直接注入靜脈，注射液也終究是靠靜脈吸收的，先回流心髒，再被推送至全身各處。
結論： mRNA疫苗會殺傷人體細胞，mRNA疫苗對人體細胞的侵犯（進入），可能發生在全身任何地方。
本人觀點： mRNA疫苗終將會被淘汰，除非應急使用，原因在於其固有的傷害性，這種傷害性至少是沒必要的，S蛋白沒必要在人體內製造，完全可以事先在體外製造好再注入人體，這也就是Novavax的方式。
