Do Vaccines Reduce the Severity of Disease?
Adakah Vaksin Meringankan Penyakit?
疫苗能降低疾病的严重程度吗?
HISHAM TIPU APA HARI INI
Hisham says that vaccinated people who are infected have milder symptoms. Is this true?
山哥说 : 接种了疫苗的感染者症状会比较轻。这是真的吗?
This chart shows the number of symptomatic cases (red bars) and asymptomatic cases (blue bars). Symptom status is only recorded on the day you first did your swab test, so if you had no symptoms but developed symptoms later, your status is not changed. An additional 18.5% of patients who were Stage 1 and 2 progress to Stage 3, 4, 5 after they first registered (See post). We don't know which group they are from.
If we presume that asymptomatic cases are false positives, the real number of cases is really only half the reported numbers (the red section).
Source: MOH Github Linelist_Cases |
Carta ini menunjukkan bilangan pesakit yang bergejala (bar merah) dan tiada gejala (bar biru). Status gejala hanya direkodkan pada hari kamu buat swab test dan daftar di dalam sistem. Kalau kamu tak bergejala pada hari itu tapi menjadi bergejala beberapa hari kemudian, status kamu tidak akan diubah. Terdapat pertambahan 18.5% pesakit dari Kategori 1 dan 2 yang merosot ke kategori 3, 4, 5 selepas mereka mula2 mendaftar di dalam sistem (Lihat post). Kita tak tahu mereka ini dari kumpulan mana.
Kalau kita andaikan pesakit yg tidak bergejala mendapat keputusan positif yg palsu, angka kes yg sebenar adalah lebih kurang separuh sahaja (bahagian merah).
Here, we have the number of cases as a percent for each day. In 2020, there was a lot of fluctuation because the number of cases were very small. For example, on some days, there were only 2 patients, and both of them were symptomatic. So this would show as 100% symptomatic for that day. The numbers before Oct 2020 are not very accurate due to this large fluctuation, so just ignore the early part of 2020.
What might have caused the percentage of symptomatic patients to increase?
Ini adalah data kes harian yang sama, sebagai peratus harian. Untuk tahun 2020, peratusan harian mempunyai variasi yg besar sebab bilangan kes sangat kecil. Contohnya, hari itu hanya ada 2 pesakit dan kedua-duanya bergejala. Ini akan menunjukkan 100% bergejala pada hari itu. Angka sebelum Oktober 2020 tidak berapa tepat disebabkan variasi yg besar, jadi abaikan bahagian awal 2020.
Apakah yang menyebabkan kenaikan peratus pesakit yang bergejala?
这个是每天病例的百分比,在 2020年,由于病例数量非常少,因此使用百分比来显示数据会出现了很大的波动。例如,如果在某个日子里,只有2名患者而且都是有症状的,那么,当天的百分百就会显示为当天 100% 有症状。由于有这种的数据波动, 所以2020 年 10 月之前的数字不是很准确。
到底是什么原因导致有症状患者的百分比的增加了呢?
In July 2021, KKM reduced the testing for asymptomatic patients.
Source: Twitter |
2021年7月,KKM 削减了对无症状患者的检测。
What are some other factors that might have caused the % of symptomatic cases to increase?
Delta causes more serious illness, so a larger percentage of patients would have symptoms. But it doesn't fit the curve very well.
How about vaccination? Vaccination is supposed to reduce your risk of developing symptoms, so technically, the more vaccines taken, the smaller the red section should be. But the opposite has happened.
We can see that after Hisham reduced testing for the asymptomatic, naturally, the symptomatic would make up the majority of patients. This means that there are actually a lot more patients out there. Now we will never know the effect of Delta and vaccination because he changed the testing criteria halfway. Yeah, we saved money on tests, but this is also one way to cook the numbers. This makes high numbers look lower, and before this change, made low numbers look higher.
还有哪些其他因素可能导致有症状病例的百分比增加?
Here is the same data, shown as an average per month.
Let's break down that number by vaccination status. Here, we see that in every month, the percentage of vaccinated patients who develop symptoms is more than the unvaccinated. This data comes from 2.9 million people, so these are not variations that occurred by chance. The number n below the month shows the number of cases for that month.
Let's break it down further by dose. From March to September 2021, the percentage of patients who were infected after Dose 1 is more than those who were infected after Dose 2 and the unvaccinated. That means if you get one dose and get infected, you are sicker than patients who were not vaccinated at all.
In this period, those who got one dose fared so much worse because they got infected while attending huge gatherings at the mega Pusat Penjangkitan Virus. For those getting Pfizer, the immune system is weakened drastically in the first 3 days after vaccination. Getting infected at this time is much worse than if you were not jabbed at all. And indeed, this graph shows that the percentage of Dose 1 patients who developed symptoms is much higher than Dose 2 or the unvaccinated. The percentage of patients who contracted Covid after Dose 1 and died is even higher. (These graphs will be published soon.)
After mega infection centres were closed in September, we see a different pattern in October and November. Now those who got 1 dose and then got infected is much less than earlier.
On October 18th, 2021, the 3rd dose was introduced, so accordingly, they got infected as well. Here, we see that the more doses taken, the sicker they are.
Besides the main brands, AstraZeneca, Pfizer and Sinovac, there are also "Others", which includes probably Cansino, Sinopharm, Johnson & Johnson and Moderna. (They are coded in the database as c, h, j and m.) There are also many patients who did not know which brand they took (u = unknown). I put all these into the "Others" group. This group is very small, less than 1%, so even if some of unknowns were the main brands, if you averaged them together, it would not make much difference.
So here you can see which brands contributed more to patients becoming sicker after Dose 1.
Dose 2. The % of patients who took 2 doses and became symptomatic is a little lower than the Dose 1 group. But the average is still higher than the unvaccinated. The brands have a slightly different effect.
Dos 2--peratus yg bergejala untuk pesakit yg menerima 2 dos lebih rendah sedikit daripada Dos 1. Tetapi purata masih lebih tinggi daripada yg tidak divaksin. Jenama membawa kesan yg sedikit berbeza dari Dos 1.
The numbers for Dose 3 is very small, so there is a lot of variation. For example, the orange bar for Sinovac is just one patient. We should not conclude anything until there are more patients in the coming months. But even with such small numbers, it looks like it is following the same trend as Dose 1 and 2. Bilangan pesakit yg sudah mengambil Dos 3 adalah sangat kecil, jadi terdapat banyak variasi. Contohnya, bar jingga untuk Sinovac hanyalah satu orang pesakit. Kita tak boleh membuat apa-apa kesimpulan sehingga terdapat lebih banyak pesakit di dalam masa yg akan datang. Tetapi, walaupun dengan jumlah yang begitu kecil, kita boleh nampak ia mengikut trend yang sama seperti Dos 1 dan 2.
Here are all the doses added together, so we see the difference by brand. In every month, the vaccinated are sicker than the unvaccinated.
Numbers don't lie, people do.Di dalam graf ini, semua dos telah dijumlahkjan sekali, jadi kita boleh nampak perbezaan di antara jenama. Di dalam setiap bulan, pesakit yang telah divaksin adalah lebih sakit daripada yang tidak divaksin.
Angka tak tipu, hanya manusia tipu.
Thank you to database sifus, Jafri and Amir for extracting this data, and to See Siong for writing the Mandarin translation.
感谢数据库的师傅 Jafri 提取了这些数据。
https://github.com/MoH-Malaysia/covid19-public/tree/main/vaccination
Thanks, jacinta... brilliant analysis...
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