Number of notifiable infectious diseases by month in 2021
| Disease |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Total |
| Acute poliomyelitis |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| Amoebic dysentery |
0 |
1 |
0 |
2 |
1 |
2 |
0 |
0 |
2 |
0 |
1 |
0 |
9 |
| Anthrax |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| Bacillary dysentery |
1 |
1 |
1 |
0 |
1 |
0 |
0 |
1 |
1 |
1 |
3 |
5 |
15 |
| Botulism |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
1 |
0 |
0 |
0 |
1 |
| Chickenpox |
82 |
104 |
146 |
124 |
149 |
121 |
119 |
126 |
134 |
148 |
178 |
158 |
1589 |
| Chikungunya fever |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| Cholera |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| Community-associated methicillin-resistant Staphylococcus aureus infection |
54 |
38 |
33 |
69 |
52 |
53 |
49 |
54 |
53 |
45 |
45 |
37 |
582 |
| Coronavirus disease 2019 (COVID-19)* |
1606 |
553 |
459 |
305 |
67 |
82 |
61 |
128 |
110 |
129 |
90 |
213 |
3803 |
| Creutzfeldt-Jakob disease |
1 |
1 |
1 |
0 |
1 |
2 |
1 |
2 |
2 |
1 |
1 |
0 |
13 |
| Dengue fever |
0 |
0 |
1 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
1 |
0 |
2 |
| Diphtheria |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| Enterovirus 71 infection |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
1 |
0 |
0 |
1 |
| Food poisoning |
Outbreaks |
6 |
8 |
26 |
7 |
7 |
18 |
27 |
10 |
19 |
47 |
22 |
8 |
205 |
| Persons affected |
18 |
29 |
72 |
16 |
26 |
52 |
70 |
24 |
60 |
149 |
71 |
35 |
622 |
| Haemophilus influenzae type b infection (invasive) |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| Hantavirus infection |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| Invasive pneumococcal disease |
1 |
2 |
0 |
2 |
0 |
2 |
2 |
1 |
1 |
1 |
8 |
5 |
25 |
| Japanese encephalitis |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| Legionnaires' disease |
1 |
2 |
3 |
3 |
5 |
5 |
11 |
13 |
2 |
12 |
7 |
5 |
69 |
| Leprosy |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
2 |
0 |
0 |
1 |
3 |
| Leptospirosis |
0 |
2 |
0 |
1 |
0 |
0 |
0 |
0 |
1 |
0 |
0 |
0 |
4 |
| Listeriosis |
2 |
0 |
0 |
2 |
0 |
2 |
3 |
3 |
2 |
2 |
0 |
1 |
17 |
| Malaria |
1 |
0 |
0 |
0 |
0 |
0 |
1 |
0 |
2 |
0 |
0 |
0 |
4 |
| Measles |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
1 |
0 |
0 |
0 |
1 |
| Meningococcal infection (invasive) |
0 |
0 |
0 |
1 |
0 |
0 |
0 |
0 |
0 |
1 |
0 |
0 |
2 |
| Middle East Respiratory Syndrome |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| Mumps |
0 |
3 |
10 |
4 |
4 |
4 |
7 |
5 |
6 |
2 |
6 |
5 |
56 |
| Novel influenza A infection |
Influenza A (H5) |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| Influenza A (H7) |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| Others |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| Paratyphoid fever |
0 |
0 |
0 |
1 |
0 |
0 |
0 |
1 |
0 |
1 |
0 |
0 |
3 |
| Plague |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| Psittacosis |
1 |
0 |
2 |
0 |
2 |
2 |
1 |
2 |
0 |
0 |
0 |
2 |
12 |
| Q fever |
0 |
0 |
1 |
0 |
1 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
2 |
| Rabies |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| Relapsing fever |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| Rubella and congenital rubella syndrome |
Rubella |
0 |
0 |
0 |
0 |
0 |
1 |
0 |
0 |
0 |
0 |
1 |
0 |
2 |
| Congenital rubella syndrome |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| Scarlet fever |
7 |
5 |
6 |
6 |
8 |
10 |
6 |
4 |
5 |
8 |
12 |
11 |
88 |
| Severe Acute Respiratory Syndrome |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| Shiga toxin-producing Escherichia coli infection |
0 |
0 |
0 |
0 |
0 |
1 |
0 |
0 |
0 |
0 |
0 |
0 |
1 |
| Smallpox |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
Streptococcus suis
infection |
1 |
2 |
0 |
0 |
1 |
0 |
0 |
0 |
0 |
1 |
0 |
0 |
5 |
| Tetanus |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
1 |
1 |
| Tuberculosis |
277 |
282 |
308 |
322 |
333 |
296 |
331 |
307 |
326 |
297 |
347 |
290 |
3716 |
| Typhoid fever |
1 |
0 |
0 |
1 |
2 |
1 |
1 |
0 |
1 |
2 |
1 |
0 |
10 |
| Typhus and other rickettsial diseases |
Scrub typhus |
0 |
2 |
0 |
2 |
0 |
3 |
3 |
3 |
2 |
3 |
3 |
1 |
22 |
| Urban typhus |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
1 |
0 |
0 |
0 |
1 |
| Spotted fever |
1 |
1 |
1 |
4 |
5 |
1 |
4 |
1 |
0 |
0 |
3 |
3 |
24 |
| Unclassified |
0 |
0 |
0 |
0 |
0 |
1 |
2 |
1 |
0 |
0 |
1 |
1 |
6 |
| Viral haemorrhagic fever |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| Viral hepatitis |
A |
2 |
1 |
2 |
0 |
2 |
0 |
3 |
0 |
1 |
0 |
2 |
2 |
15 |
| B |
0 |
0 |
2 |
0 |
0 |
3 |
4 |
2 |
1 |
4 |
1 |
0 |
17 |
| C |
3 |
2 |
1 |
2 |
0 |
2 |
5 |
2 |
1 |
3 |
1 |
1 |
23 |
| D |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
1 |
0 |
0 |
0 |
0 |
1 |
| E |
4 |
6 |
3 |
4 |
4 |
4 |
5 |
7 |
6 |
14 |
13 |
7 |
77 |
| West Nile Virus Infection |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| Whooping cough |
0 |
0 |
0 |
0 |
0 |
1 |
0 |
0 |
0 |
0 |
0 |
1 |
2 |
| Yellow fever |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| Zika Virus Infection |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| Total |
2052 |
1016 |
1006 |
862 |
645 |
617 |
646 |
674 |
683 |
723 |
747 |
758 |
10429 |
Note:
* In January 2022, the Centre for Health Protection of the Department of Health revised the figures of Coronavirus disease 2019 (COVID-19) according to the date of reporting of the cases.
Remarks:
Persons affected in Food poisoning outbreaks were excluded in the monthly total and grand total.
Information as at 11 September 2023
Download number of notifiable infectious diseases by month in 2021 (in CSV format)
Uploaded on 29 September 2023
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